dyestuff vs colouring material

dyestuff and colouring material both are nouns.

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

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

dyestuff: a usually soluble substance for staining or coloring e.g. fabrics or hair
colouring material: any material used for its color

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

dyestuff (noun)	colouring material (noun)
a usually soluble substance for staining or coloring e.g. fabrics or hair	any material used for its color