gilgai soil vs dirt

gilgai soil and dirt both are nouns.

Word	Noun	Adjective	Verb	Adverb
gilgai soil	Yes	No	No	No
dirt	Yes	Yes	No	No

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

gilgai soil: soil in the melon holes of Australia
dirt: the part of the earth's surface consisting of humus and disintegrated rock

Other hypernyms of gilgai soil include soil.

gilgai soil (noun)	dirt (noun)
soil in the melon holes of Australia	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

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