twenties vs decade

twenties and decade both are nouns.

Word	Noun	Adjective	Verb	Adverb
twenties	Yes	No	No	No
decade	Yes	No	No	No

As nouns, decade is a hypernym of twenties; that is, decade is a word with a broader meaning than twenties:

Other hypernyms of twenties include decennary, decennium.

twenties (noun)	decade (noun)
the time of life between 20 and 30	the cardinal number that is the sum of nine and one; the base of the decimal system
the decade from 1920 to 1929	a period of 10 years