stoop vs cower

stoop is a noun but cower is not a noun.

Word	Noun	Adjective	Verb	Adverb
stoop	Yes	No	Yes	No
cower	No	No	Yes	No

As verbs, cower is a hyponym of stoop; that is, cower is a word with a more specific, narrower meaning than stoop:

Other hyponyms of stoop include squinch, huddle.

stoop (noun)	cower (noun)
an inclination of the top half of the body forward and downward
small porch or set of steps at the front entrance of a house
basin for holy water

stoop (verb)	cower (verb)
carry oneself, often habitually, with head, shoulders, and upper back bent forward	show submission or fear
bend one's back forward from the waist on down	crouch or curl up
descend swiftly, as if on prey
sag, bend, bend over or down
debase oneself morally, act in an undignified, unworthy, or dishonorable way