A replacement or stand-in for something that achieves a similar result or purpose.
A player who is available to replace another if the need arises, and who may or may not actually do so.
One who enlists for military service in the place of a conscript.
To remove (a player) from the field of play and bring on another in his place.
To serve as a replacement (for someone or something).
To use in place of something else, with the same function.
To use X in place of Y.
To use Y in place of X; to replace X with Y.
A synthetic compound.
Of, or relating to synthesis.
Produced by synthesis instead of being isolated from a natural source (but may be identical to a product so obtained).
Artificial, not genuine.
Produced by synthesis, thought to have the same effect as its natural counterpart, but chemically different from it.
Pertaining to the joining of bound morphemes in a word (compare analytic).
Of a language, having a grammar principally dependent on the use of bound morphemes to indicate syntactic relationships (compare analytic).