nomad vs bird of passage

nomad and bird of passage both are nouns.

Word	Noun	Adjective	Verb	Adverb
nomad	Yes	No	No	No
bird of passage	Yes	No	No	No

As nouns, bird of passage is a hypernym of nomad; that is, bird of passage is a word with a broader meaning than nomad:

nomad: a member of a people who have no permanent home but move about according to the seasons
bird of passage: someone who leads a wandering unsettled life

Other hypernyms of nomad include roamer, rover, wanderer.

nomad (noun)	bird of passage (noun)
a member of a people who have no permanent home but move about according to the seasons	any bird that migrates seasonally
	someone who leads a wandering unsettled life