active transport vs drug

active transport and drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
active transport	Yes	No	No	No
drug	Yes	No	Yes	No

active transport (noun)	drug (noun)
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy	a substance that is used as a medicine or narcotic

active transport (verb)	drug (verb)
	administer a drug to
	use recreational drugs