layette vs kit

layette and kit both are nouns.

Word	Noun	Adjective	Verb	Adverb
layette	Yes	No	No	No
kit	Yes	No	Yes	No

As nouns, kit is a hypernym of layette; that is, kit is a word with a broader meaning than layette:

layette: kit consisting of a complete outfit (clothing and accessories) for a new baby
kit: gear consisting of a set of articles or tools for a specified purpose

Other hypernyms of layette include outfit.

layette (noun)	kit (noun)
kit consisting of a complete outfit (clothing and accessories) for a new baby	young of any of various fur-bearing animals
	gear consisting of a set of articles or tools for a specified purpose
	a case for containing a set of articles

layette (verb)	kit (verb)
	supply with a set of articles or tools