bathtub gin vs gin

bathtub gin and gin both are nouns.

Word	Noun	Adjective	Verb	Adverb
bathtub gin	Yes	No	No	No
gin	Yes	No	Yes	No

As nouns, gin is a hypernym of bathtub gin; that is, gin is a word with a broader meaning than bathtub gin:

bathtub gin (noun)	gin (noun)
homemade gin especially that made illegally	a form of rummy in which a player can go out if the cards remaining in their hand total less than 10 points
	a machine that separates the seeds from raw cotton fibers
	a trap for birds or small mammals; often has a slip noose
	strong liquor flavored with juniper berries

bathtub gin (verb)	gin (verb)
	trap with a snare
	separate the seeds from (cotton) with a cotton gin