child's play vs breeze

child's play and breeze both are nouns.

Word	Noun	Adjective	Verb	Adverb
child's play	Yes	No	No	No
breeze	Yes	No	Yes	No

As nouns, child's play and breeze are synonyms defined as:

Other synonyms of child's play include cinch, duck soup, picnic, piece of cake, pushover, snap, walkover.

child's play (noun)	breeze (noun)
any undertaking that is easy to do	any undertaking that is easy to do
activity by children that is guided more by imagination than by fixed rules	a slight wind (usually refreshing)

child's play (verb)	breeze (verb)
	to proceed quickly and easily
	blow gently and lightly