black lotion vs lotion

black lotion and lotion both are nouns.

Word	Noun	Adjective	Verb	Adverb
black lotion	Yes	No	No	No
lotion	Yes	No	No	No

As nouns, lotion is a hypernym of black lotion; that is, lotion is a word with a broader meaning than black lotion:

black lotion: a mixture of calomel and limewater that is used on syphilitic sores
lotion: liquid preparation having a soothing or antiseptic or medicinal action when applied to the skin

Other hypernyms of black lotion include application.

black lotion (noun)	lotion (noun)
a mixture of calomel and limewater that is used on syphilitic sores	any of various cosmetic preparations that are applied to the skin
	liquid preparation having a soothing or antiseptic or medicinal action when applied to the skin