groom vs doll up

groom is a noun but doll up is not a noun.

Word	Noun	Adjective	Verb	Adverb
groom	Yes	No	Yes	No
doll up	No	No	Yes	No

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

groom (noun)	doll up (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

groom (verb)	doll up (verb)
care for one's external appearance	use special care in dressing, making-up, etc.
give a neat appearance to
educate for a future role or function