fib vs fairy story

fib and fairy story both are nouns.

Word	Noun	Adjective	Verb	Adverb
fib	Yes	No	Yes	No
fairy story	Yes	No	No	No

As nouns, fairy story is a hyponym of fib; that is, fairy story is a word with a more specific, narrower meaning than fib:

fib: a trivial lie
fairy story: an interesting but highly implausible story; often told as an excuse

Other hyponyms of fib include cock-and-bull story, fairy tale, fairytale, song and dance.

fib (noun)	fairy story (noun)
a trivial lie	a story about fairies; told to amuse children
	an interesting but highly implausible story; often told as an excuse

fib (verb)	fairy story (verb)
tell a relatively insignificant lie