lac dye vs dyestuff

lac dye and dyestuff both are nouns.

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

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

lac dye: scarlet dye like cochineal; extracted with alkali from stick lac
dyestuff: a usually soluble substance for staining or coloring e.g. fabrics or hair

Other hypernyms of lac dye include dye.

lac dye (noun)	dyestuff (noun)
scarlet dye like cochineal; extracted with alkali from stick lac	a usually soluble substance for staining or coloring e.g. fabrics or hair