envelop vs engulf

envelop and engulf both are verbs.

Word	Noun	Adjective	Verb	Adverb
envelop	No	No	Yes	No
engulf	No	No	Yes	No

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

Other hyponyms of envelop include benight, tube, capsulate, capsule, capsulise, capsulize, sheathe, cocoon, bathe, cover, enshroud, hide, shroud.

envelop (verb)	engulf (verb)
enclose or enfold completely with or as if with a covering	devote (oneself) fully to
	flow over or cover completely