drain vs eat

drain is a noun but eat is not a noun.

Word	Noun	Adjective	Verb	Adverb
drain	Yes	No	Yes	No
eat	No	No	Yes	No

As verbs, eat is a hypernym of drain; that is, eat is a word with a broader meaning than drain:

Other hypernyms of drain include consume, deplete, eat up, exhaust, expend, run through, use, use up, wipe out.

drain (noun)	eat (noun)
emptying something accomplished by allowing liquid to run out of it
a gradual depletion of energy or resources
a pipe through which liquid is carried away
tube inserted into a body cavity (as during surgery) to remove unwanted material

drain (verb)	eat (verb)
empty of liquid; drain the liquid from	cause to deteriorate due to the action of water, air, or an acid
make weak	take in solid food
deplete of resources	eat a meal; take a meal
flow off gradually	take in food; used of animals only
	use up (resources or materials)
	worry or cause anxiety in a persistent way