dozer vs tractor

dozer and tractor both are nouns.

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

As nouns, tractor is a hypernym of dozer; that is, tractor is a word with a broader meaning than dozer:

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

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