substitute, replacement -- (a person or thing that takes or can take the place of another)
substitute, reserve, second-stringer -- (an athlete who plays only when a starter on the team is replaced)
stand-in, substitute, relief, reliever, backup, backup man, fill-in -- (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")
Overview of verb substitute
The verb substitute has 3 senses
substitute, replace, interchange, exchange -- (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")
substitute, sub, stand in, fill in -- (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")
substitute, deputize, deputise, step in -- (act as a substitute; "She stood in for the soprano who suffered from a cold")
Overview of adj substitute
The adj substitute has 3 senses
utility, substitute -- (capable of substituting in any of several positions on a team; "a utility infielder")
alternate, alternative, substitute -- (serving or used in place of another; "an alternative plan")
ersatz, substitute -- (artificial and inferior; "ersatz coffee"; "substitute coffee")
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