crawl vs cower

crawl is a noun but cower is not a noun.

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

As verbs, crawl and cower are synonyms defined as:

Other synonyms of crawl include creep, cringe, fawn, grovel.

crawl (noun)	cower (noun)
a slow mode of locomotion on hands and knees or dragging the body
a swimming stroke; arms are moved alternately overhead accompanied by a flutter kick
a very slow movement

crawl (verb)	cower (verb)
move slowly; in the case of people or animals with the body near the ground	show submission or fear
swim by doing the crawl	crouch or curl up
show submission or fear
be full of
feel as if crawling with insects