indurated clay vs dirt

indurated clay and dirt both are nouns.

Word	Noun	Adjective	Verb	Adverb
indurated clay	Yes	No	No	No
dirt	Yes	Yes	No	No

As nouns, dirt is a hypernym of indurated clay; that is, dirt is a word with a broader meaning than indurated clay:

indurated clay: hardened clay
dirt: the part of the earth's surface consisting of humus and disintegrated rock

Other hypernyms of indurated clay include soil.

indurated clay (noun)	dirt (noun)
hardened clay	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

indurated clay (adjective)	dirt (adjective)
	(of roads) not leveled or drained; unsuitable for all year travel