renter vs leaseholder

renter and leaseholder both are nouns.

Word	Noun	Adjective	Verb	Adverb
renter	Yes	No	No	No
leaseholder	Yes	No	No	No

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

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

Other hyponyms of renter include lessee, boarder, lodger, roomer.

renter (noun)	leaseholder (noun)
someone who pays rent to use land or a building or a car that is owned by someone else	a tenant who holds a lease
an owner of property who receives payment for its use by another person