basic dye vs dyestuff

basic dye and dyestuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
basic dye	Yes	No	No	No
dyestuff	Yes	No	No	No

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

basic dye: a dye that is considered to be a base because the chromophore is part of a positive ion
dyestuff: a usually soluble substance for staining or coloring e.g. fabrics or hair

Other hypernyms of basic dye include dye.

basic dye (noun)	dyestuff (noun)
a dye that is considered to be a base because the chromophore is part of a positive ion	a usually soluble substance for staining or coloring e.g. fabrics or hair