mordant vs colouring material

mordant and colouring material both are nouns.

Word	Noun	Adjective	Verb	Adverb
mordant	Yes	Yes	No	No
colouring material	Yes	No	No	No

As nouns, colouring material is a hypernym of mordant; that is, colouring material is a word with a broader meaning than mordant:

mordant: a substance used to treat leather or other materials before dyeing; aids in dyeing process
colouring material: any material used for its color

Other hypernyms of mordant include color, coloring material, colour.

mordant (noun)	colouring material (noun)
a substance used to treat leather or other materials before dyeing; aids in dyeing process	any material used for its color

mordant (adjective)	colouring material (adjective)
of a substance, especially a strong acid; capable of destroying or eating away by chemical action
harshly ironic or sinister