Back and Tailback

Back noun - A behind part or surface.

Tailback and back are semantically related. In some cases you can replace term "Tailback" with "Back", this nouns are similar.

Nearby Words: backward, backing, backed, backside, backwards

Tailback noun - (American football) the person who plays tailback.

Back and tailback are semantically related. Sometimes you can use "Back" instead a noun "Tailback".