song and dance vs fairy tale

song and dance and fairy tale both are nouns.

Word	Noun	Adjective	Verb	Adverb
song and dance	Yes	No	No	No
fairy tale	Yes	No	No	No

As nouns, song and dance and fairy tale are synonyms defined as:

song and dance and fairy tale: an interesting but highly implausible story; often told as an excuse

Other synonyms of song and dance include cock-and-bull story, fairy story, fairytale.

song and dance (noun)	fairy tale (noun)
theatrical performance combining singing and dancing	a story about fairies; told to amuse children
an interesting but highly implausible story; often told as an excuse	an interesting but highly implausible story; often told as an excuse