substitute

noun
UK /ˈsʌbstɪtjuːt/
US /ˈsʌbstɪtuːt/

A substitute is someone or something that takes the place of another.

When our teacher was sick, a substitute taught the class.

SYNONYMS

replacementstand-inbackupalternateproxy

RELATED WORDS

replacesubstitutionswapcoverrelief

OTHER MEANINGS

2. To use something in place of another thing.

You can substitute honey for sugar in this recipe.

3. A player who comes into a game to replace another player.

The coach sent in a substitute during the second half.

4. A thing that is used instead of the usual or original thing.

This fake leather is a cheap substitute for real leather.