hobo vs drifter

hobo and drifter both are nouns.

Word	Noun	Adjective	Verb	Adverb
hobo	Yes	No	No	No
drifter	Yes	No	No	No

As nouns, drifter is a hypernym of hobo; that is, drifter is a word with a broader meaning than hobo:

hobo: a vagrant
drifter: a wanderer who has no established residence or visible means of support

Other hypernyms of hobo include clochard, floater, vagabond, vagrant.

hobo (noun)	drifter (noun)
a vagrant	a wanderer who has no established residence or visible means of support
a worker who moves around and works temporarily in different places