surround vs assail

surround is a noun but assail is not a noun.

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

As verbs, assail is a hypernym of surround; that is, assail is a word with a broader meaning than surround:

surround: surround so as to force to give up
assail: launch an attack or assault on; begin hostilities or start warfare with

Other hypernyms of surround include attack.

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

surround (verb)	assail (verb)
surround so as to force to give up	attack in speech or writing
surround with a wall in order to fortify	attack someone physically or emotionally
extend on all sides of simultaneously; encircle	launch an attack or assault on; begin hostilities or start warfare with
envelop completely