encircle vs hoop

encircle is not a noun while hoop is a noun.

Word	Noun	Adjective	Verb	Adverb
encircle	No	No	Yes	No
hoop	Yes	No	Yes	No

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

encircle (noun)	hoop (noun)
	a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling
	a light curved skeleton to spread out a skirt
	a small arch used as croquet equipment
	horizontal circular metal hoop supporting a net through which players try to throw the basketball

encircle (verb)	hoop (verb)
bind with something round or circular	bind or fasten with a hoop
form or draw a circle around