dry mustard vs mustard

dry mustard and mustard both are nouns.

Word	Noun	Adjective	Verb	Adverb
dry mustard	Yes	No	No	No
mustard	Yes	No	No	No

As nouns, mustard is a hypernym of dry mustard; that is, mustard is a word with a broader meaning than dry mustard:

dry mustard: a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic
mustard: pungent powder or paste prepared from ground mustard seeds

Other hypernyms of dry mustard include emetic, nauseant, vomit, vomitive, table mustard.

dry mustard (noun)	mustard (noun)
a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic	pungent powder or paste prepared from ground mustard seeds
	leaves eaten as cooked greens
	any of several cruciferous plants of the genus Brassica