argillite vs sedimentary rock

argillite and sedimentary rock both are nouns.

Word	Noun	Adjective	Verb	Adverb
argillite	Yes	No	No	No
sedimentary rock	Yes	No	No	No

As nouns, sedimentary rock is a hypernym of argillite; that is, sedimentary rock is a word with a broader meaning than argillite:

argillite: a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
sedimentary rock: rock formed from consolidated clay sediments

argillite (noun)	sedimentary rock (noun)
a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages	rock formed from consolidated clay sediments