drown vs swim

drown is not a noun while swim is a noun.

Word	Noun	Adjective	Verb	Adverb
drown	No	No	Yes	No
swim	Yes	No	Yes	No

As verbs, drown and swim are synonyms defined as:

drown (noun)	swim (noun)
	the act of swimming

drown (verb)	swim (verb)
die from being submerged in water, getting water into the lungs, and asphyxiating	travel through water
kill by submerging in water	be afloat either on or below a liquid surface and not sink to the bottom
get rid of as if by submerging	move as if gliding through water
cover completely or make imperceptible	be covered with or submerged in a liquid
be in danger of dying from submersion in a liquid and asphyxiation	be dizzy or giddy
be covered with or submerged in a liquid