lessee vs tenant

lessee and tenant both are nouns.

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

As nouns, tenant is a hypernym of lessee; that is, tenant is a word with a broader meaning than lessee:

lessee: a tenant who holds a lease
tenant: someone who pays rent to use land or a building or a car that is owned by someone else

Other hypernyms of lessee include holder, renter.

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

lessee (verb)	tenant (verb)
	occupy as a tenant