Synonyms of the word

second-stringer

• n. A person who plays second string. A person who is kept on a sports team as a backup in case a "first-string"…
• n. A person who is not good enough to be considered proficient but may be useful as a backup.

athlete

• n. A participant in a group of sporting activities which includes track and field, road running, cross country…
• n. (US, Canada) A person who actively participates in physical sports, especially with great skill; a sportsperson.
• n. An exceptionally physically fit person.

jock

• n. (slang, archaic) A common man.
• n. (Britain, slang, pejorative) A Scotsman.
• n. (slang, rare, dated) The penis.
• n. An athletic supporter worn by men to support the genitals especially during sports, a jockstrap.
• n. (US, slang) A young male athlete (through college age).
• n. (US, slang, pejorative) An enthusiastic athlete or sports fan, especially one with few other interests…
• n. (US, slang, computing, in combination) A specialist computer programmer.
• v. (slang) to masturbate.
• v. (slang) to humiliate.
• v. (slang) to steal.

reserve

• n. (behaviour) Restriction.
• n. That which is reserved or kept back, as for future use.
• n. (social) Something initially kept back for later use in a recreation.
• n. In exhibitions, a distinction indicating that the recipient will get a prize in the event of another person…
• n. (calico printing) A resist.
• n. A preparation used on an object being electroplated to fix the limits of the deposit.
• v. To keep back; to retain.
• v. To keep in store for future or special use.
• v. To book in advance; to make a reservation.
• v. (obsolete) To make an exception of; to except.

substitute

• v. (transitive) To use in place of something else, with the same function.
• v. (transitive) In the phrase "substitute X with/by Y", to use Y in place of X; to replace X with Y.
• v. (transitive, sports) To remove (a player) from the field of play and bring on another in his place.
• v. (intransitive) To serve as a replacement (for someone or something).
• n. A replacement or stand-in for something that achieves a similar result or purpose.
• n. (sports) A player who is available to replace another if the need arises, and who may or may not actually…
• n. (historical) One who enlists for military service in the place of a conscript.