prettify vs groom

prettify is not a noun while groom is a noun.

Word	Noun	Adjective	Verb	Adverb
prettify	No	No	Yes	No
groom	Yes	No	Yes	No

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

prettify (noun)	groom (noun)
	a man who has recently been married
	someone employed in a stable to take care of the horses
	a man participant in his own marriage ceremony

prettify (verb)	groom (verb)
make more beautiful	care for one's external appearance
	give a neat appearance to
	educate for a future role or function