roamer vs wanderer

roamer and wanderer both are nouns.

Word	Noun	Adjective	Verb	Adverb
roamer	Yes	No	No	No
wanderer	Yes	No	No	No

As nouns, roamer and wanderer are synonyms defined as:

Other synonyms of roamer include bird of passage, rover.

roamer (noun)	wanderer (noun)
someone who leads a wandering unsettled life	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