look sharp vs hurry

look sharp is not a noun while hurry is a noun.

Word	Noun	Adjective	Verb	Adverb
look sharp	No	No	Yes	No
hurry	Yes	No	Yes	No

As verbs, look sharp and hurry are synonyms defined as:

Other synonyms of look sharp include festinate, hasten, rush.

look sharp (noun)	hurry (noun)
	the act of moving hurriedly and in a careless manner
	overly eager speed (and possible carelessness)
	a condition of urgency making it necessary to hurry