landholder vs abutter

landholder and abutter both are nouns.

Word	Noun	Adjective	Verb	Adverb
landholder	Yes	No	No	No
abutter	Yes	No	No	No

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

Other hyponyms of landholder include franklin, freeholder, laird, landlord, squire.

landholder (noun)	abutter (noun)
a holder or proprietor of land	the owner of contiguous property