tractor vs dozer

tractor and dozer both are nouns.

Word	Noun	Adjective	Verb	Adverb
tractor	Yes	No	No	No
dozer	Yes	No	No	No

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

tractor: a wheeled vehicle with large wheels; used in farming and other applications
dozer: large powerful tractor; a large blade in front flattens areas of ground

Other hyponyms of tractor include bulldozer, skidder.

tractor (noun)	dozer (noun)
a wheeled vehicle with large wheels; used in farming and other applications	large powerful tractor; a large blade in front flattens areas of ground
a truck that has a cab but no body; used for pulling large trailers or vans