bromothymol blue vs dyestuff

bromothymol blue and dyestuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
bromothymol blue	Yes	No	No	No
dyestuff	Yes	No	No	No

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

bromothymol blue: a dye used as an acid-base indicator, with useful range between pH 6.0 and 7.6
dyestuff: a usually soluble substance for staining or coloring e.g. fabrics or hair

Other hypernyms of bromothymol blue include acid-base indicator, dye.

bromothymol blue (noun)	dyestuff (noun)
a dye used as an acid-base indicator, with useful range between pH 6.0 and 7.6	a usually soluble substance for staining or coloring e.g. fabrics or hair