landowner vs freeholder

landowner and freeholder both are nouns.

Word	Noun	Adjective	Verb	Adverb
landowner	Yes	No	No	No
freeholder	Yes	No	No	No

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

Other hyponyms of landowner include abutter, franklin, laird, landlord, squire.

landowner (noun)	freeholder (noun)
a holder or proprietor of land	the owner of a freehold