To give notice to; inform:
Represent is defined as to express in words, symbolize or stand for.
To pay back or return; refund:
Substitute means to use something instead of the originally needed item or to have a person do something for another.
answer in writing
A person standing by to take the place of another if necessary; substitute
A member of the armed forces available for assignment to fill a vacancy or complete a quota; reinforcement
(Psychiatry) A substitute figure, esp. a person of some authority, who replaces a father or mother in one's feelings
To answer is defined as to give a response to a question in either an oral or written manner, or by a physical gesture.
To protect or screen from light or heat
To put something into (a container, for example) to capacity or to a desired level:
Relief is the ease of pain, tension, strain or other discomfort.
(Baseball) A relief pitcher.
An overflow or accumulation caused by clogging or by a stoppage:
someone who takes the place of another (as when things get dangerous or difficult)
Find another word for fill-in. In this page you can discover 34 synonyms, antonyms, idiomatic expressions, and related words for fill-in, like: complete, apprise, represent, clue-in, act for, replace, acquaint, fill-out, substitute, leave blank and alternate.