envelop vs shroud

envelop is not a noun while shroud is a noun.

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

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

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

envelop (noun)	shroud (noun)
	burial garment in which a corpse is wrapped
	(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
	a line that suspends the harness from the canopy of a parachute

envelop (verb)	shroud (verb)
enclose or enfold completely with or as if with a covering	wrap in a shroud
	cover as if with a shroud
	form a cover like a shroud