dirt vs ungraded

dirt is a noun but ungraded is not a noun.

Word	Noun	Adjective	Verb	Adverb
dirt	Yes	Yes	No	No
ungraded	No	Yes	No	No

As adjectives, dirt and ungraded are synonyms defined as:

dirt and ungraded: (of roads) not leveled or drained; unsuitable for all year travel

dirt (noun)	ungraded (noun)
disgraceful gossip about the private lives of other people
anything regarded as making something unclean
the part of the earth's surface consisting of humus and disintegrated rock
obscene terms for feces

dirt (adjective)	ungraded (adjective)
(of roads) not leveled or drained; unsuitable for all year travel	not arranged in order hierarchically
	(of roads) not leveled or drained; unsuitable for all year travel