groom vs manicure

groom and manicure both are nouns.

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

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

groom (noun)	manicure (noun)
a man who has recently been married	professional care for the hands and fingernails
someone employed in a stable to take care of the horses
a man participant in his own marriage ceremony

groom (verb)	manicure (verb)
care for one's external appearance	care for (one's hand) by cutting and shaping the nails, etc.
give a neat appearance to	trim carefully and neatly
educate for a future role or function