nursery vs day nursery

nursery and day nursery both are nouns.

Word	Noun	Adjective	Verb	Adverb
nursery	Yes	No	No	No
day nursery	Yes	No	No	No

As nouns, day nursery is a hyponym of nursery; that is, day nursery is a word with a more specific, narrower meaning than nursery:

nursery: a child's room for a baby
day nursery: a nursery for the supervision of preschool children while the parents work

Other hyponyms of nursery include day care center.

nursery (noun)	day nursery (noun)
a child's room for a baby	a nursery for the supervision of preschool children while the parents work