envelop vs sheathe

envelop and sheathe both are verbs.

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

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

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

envelop (verb)	sheathe (verb)
enclose or enfold completely with or as if with a covering	enclose with a sheath
	cover with a protective sheathing
	plunge or bury (a knife or sword) in flesh