circumvent vs surround

circumvent is not a noun while surround is a noun.

Word	Noun	Adjective	Verb	Adverb
circumvent	No	No	Yes	No
surround	Yes	No	Yes	No

As verbs, circumvent and surround are synonyms defined as:

Other synonyms of circumvent include beleaguer, besiege, hem in.

circumvent (noun)	surround (noun)
	the area in which something exists or lives

circumvent (verb)	surround (verb)
avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues)	surround so as to force to give up
beat through cleverness and wit	surround with a wall in order to fortify
surround so as to force to give up	extend on all sides of simultaneously; encircle
	envelop completely