| alternate | | |
| n. (person) | 1. alternate, replacement, surrogate | someone who takes the place of another person. |
| ~ backup man, fill-in, reliever, stand-in, backup, substitute, relief | someone who takes the place of another (as when things get dangerous or difficult).; "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins" |
| v. (change) | 2. alternate, jump | go back and forth; swing back and forth between two states or conditions. |
| ~ vary, alter, change | become different in some particular way, without permanently losing one's or its former characteristics or essence.; "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season" |
| v. (social) | 3. alternate | exchange people temporarily to fulfill certain jobs and functions. |
| ~ exchange | hand over one and receive another, approximately equivalent.; "exchange prisoners"; "exchange employees between branches of the company" |
| ~ rotate | exchange on a regular basis.; "We rotate the lead soprano every night" |
| v. (cognition) | 4. alternate, understudy | be an understudy or alternate for a role. |
| ~ memorise, memorize, con, learn | commit to memory; learn by heart.; "Have you memorized your lines for the play yet?" |
| v. (change) | 5. alternate, flip, flip-flop, interchange, switch, tack | reverse (a direction, attitude, or course of action). |
| ~ change by reversal, reverse, turn | change to the contrary.; "The trend was reversed"; "the tides turned against him"; "public opinion turned when it was revealed that the president had an affair with a White House intern" |
| v. (change) | 6. alternate, take turns | do something in turns.; "We take turns on the night shift" |
| ~ spell | take turns working.; "the workers spell every four hours" |
| ~ act, move | perform an action, or work out or perform (an action).; "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel" |
| adj. | 7. alternate | every second one of a series.; "the cleaning lady comes on alternate Wednesdays"; "jam every other day" |
| ~ cyclical, cyclic | recurring in cycles. |
| adj. | 8. alternate, alternative, substitute | serving or used in place of another.; "an alternative plan" |
| ~ secondary | being of second rank or importance or value; not direct or immediate.; "the stone will be hauled to a secondary crusher"; "a secondary source"; "a secondary issue"; "secondary streams" |
| adj. | 9. alternate, alternating | occurring by turns; first one and then the other.; "alternating feelings of love and hate" |
| ~ cyclical, cyclic | recurring in cycles. |
| adj. | 10. alternate | of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired.; "stems with alternate leaves" |
| ~ phytology, botany | the branch of biology that studies plants. |
| proxy | | |
| n. (person) | 1. placeholder, procurator, proxy | a person authorized to act for another. |
| ~ agent | a representative who acts on behalf of other persons or organizations. |
| n. (communication) | 2. proxy | a power of attorney document given by shareholders of a corporation authorizing a specific vote on their behalf at a corporate meeting. |
| ~ power of attorney | a legal instrument authorizing someone to act as the grantor's agent. |
| substitute | | |
| n. (cognition) | 1. replacement, substitute | a person or thing that takes or can take the place of another. |
| ~ equivalent | a person or thing equal to another in value or measure or force or effect or significance etc.; "send two dollars or the equivalent in stamps" |
| ~ ersatz | an artificial or inferior substitute or imitation. |
| ~ successor | a thing or person that immediately replaces something or someone. |
| ~ succedaneum | (medicine) something that can be used as a substitute (especially any medicine that may be taken in place of another). |
| n. (person) | 2. reserve, second-stringer, substitute | an athlete who plays only when a starter on the team is replaced. |
| ~ bench | the reserve players on a team.; "our team has a strong bench" |
| ~ athlete, jock | a person trained to compete in sports. |
| ~ bench warmer | (sports) a substitute who seldom plays. |
| ~ pinch hitter | (baseball) a substitute for the regular batter. |
| n. (person) | 3. backup, backup man, fill-in, relief, reliever, stand-in, substitute | someone who takes the place of another (as when things get dangerous or difficult).; "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins" |
| ~ compeer, equal, peer, match | a person who is of equal standing with another in a group. |
| ~ locum, locum tenens | someone (physician or clergyman) who substitutes temporarily for another member of the same profession. |
| ~ stunt man, stunt woman, double | a stand-in for movie stars to perform dangerous stunts.; "his first job in Hollywood was as a double for Clark Gable" |
| ~ alternate, surrogate, replacement | someone who takes the place of another person. |
| v. (possession) | 4. exchange, interchange, replace, substitute | put in the place of another; switch seemingly equivalent items.; "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"; "synonyms can be interchanged without a changing the context's meaning" |
| ~ alter, change, modify | cause to change; make different; cause a transformation.; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue" |
| ~ shift | move and exchange for another.; "shift the date for our class reunion" |
| ~ reduce | simplify the form of a mathematical equation of expression by substituting one term for another. |
| ~ truncate | replace a corner by a plane. |
| ~ retool | provide (a workshop or factory) with new tools. |
| ~ subrogate | substitute one creditor for another, as in the case where an insurance company sues the person who caused an accident for the insured. |
| v. (possession) | 5. fill in, stand in, sub, substitute | be a substitute.; "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet" |
| ~ exchange, interchange, change | give to, and receive from, one another.; "Would you change places with me?"; "We have been exchanging letters for a year" |
| v. (social) | 6. deputise, deputize, step in, substitute | act as a substitute.; "She stood in for the soprano who suffered from a cold" |
| ~ cover | help out by taking someone's place and temporarily assuming his responsibilities.; "She is covering for our secretary who is ill this week" |
| ~ supercede, supersede, supervene upon, supplant, replace | take the place or move into the position of.; "Smith replaced Miller as CEO after Miller left"; "the computer has supplanted the slide rule"; "Mary replaced Susan as the team's captain and the highest-ranked player in the school" |
| adj. | 7. substitute, utility | capable of substituting in any of several positions on a team.; "a utility infielder" |
| ~ secondary | being of second rank or importance or value; not direct or immediate.; "the stone will be hauled to a secondary crusher"; "a secondary source"; "a secondary issue"; "secondary streams" |
| adj. | 8. ersatz, substitute | artificial and inferior.; "ersatz coffee"; "substitute coffee" |
| ~ artificial, unreal | contrived by art rather than nature.; "artificial flowers"; "artificial flavoring"; "an artificial diamond"; "artificial fibers"; "artificial sweeteners" |
| understudy | | |
| n. (person) | 1. standby, understudy | an actor able to replace a regular performer when required. |
| ~ actor, histrion, thespian, role player, player | a theatrical performer. |
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