Iridaceae vs genus Iris

Iridaceae and genus Iris both are nouns.

Word	Noun	Adjective	Verb	Adverb
Iridaceae	Yes	No	No	No
genus Iris	Yes	No	No	No

As nouns, genus Iris is a hyponym of Iridaceae; that is, genus Iris is a word with a more specific, narrower meaning than Iridaceae:

Iridaceae: large family of usually perennial geophytic herbs with rhizomes or corms or bulbs
genus Iris: large genus of perennials that develop from bulbs or rhizomes

Iridaceae (noun)	genus Iris (noun)
large family of usually perennial geophytic herbs with rhizomes or corms or bulbs	large genus of perennials that develop from bulbs or rhizomes