emetic vs dry mustard

emetic and dry mustard both are nouns.

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

As nouns, dry mustard is a hyponym of emetic; that is, dry mustard is a word with a more specific, narrower meaning than emetic:

emetic: a medicine that induces nausea and vomiting
dry mustard: a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic

Other hyponyms of emetic include ipecac, powdered mustard.

emetic (noun)	dry mustard (noun)
a medicine that induces nausea and vomiting	a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic