tenant vs roomer

tenant and roomer both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenant	Yes	No	Yes	No
roomer	Yes	No	No	No

As nouns, roomer is a hyponym of tenant; that is, roomer is a word with a more specific, narrower meaning than tenant:

tenant: someone who pays rent to use land or a building or a car that is owned by someone else
roomer: a tenant in someone's house

Other hyponyms of tenant include leaseholder, lessee, boarder, lodger.

tenant (noun)	roomer (noun)
someone who pays rent to use land or a building or a car that is owned by someone else	a tenant in someone's house
any occupant who dwells in a place
a holder of buildings or lands by any kind of title (as ownership or lease)

tenant (verb)	roomer (verb)
occupy as a tenant