drown vs spread over

drown and spread over both are verbs.

Word	Noun	Adjective	Verb	Adverb
drown	No	No	Yes	No
spread over	No	No	Yes	No

As verbs, spread over is a hypernym of drown; that is, spread over is a word with a broader meaning than drown:

Other hypernyms of drown include cover.

drown (verb)	spread over (verb)
die from being submerged in water, getting water into the lungs, and asphyxiating	form a cover over
kill by submerging in water
get rid of as if by submerging
cover completely or make imperceptible
be in danger of dying from submersion in a liquid and asphyxiation
be covered with or submerged in a liquid