bird of passage vs wanderer

bird of passage and wanderer both are nouns.

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

As nouns, bird of passage and wanderer are synonyms defined as:

bird of passage and wanderer: someone who leads a wandering unsettled life

Other synonyms of bird of passage include roamer, rover.

bird of passage (noun)	wanderer (noun)
any bird that migrates seasonally	a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine
someone who leads a wandering unsettled life	someone who leads a wandering unsettled life