envelopment vs inclosure

envelopment and inclosure both are nouns.

Word	Noun	Adjective	Verb	Adverb
envelopment	Yes	No	No	No
inclosure	Yes	No	No	No

As nouns, envelopment and inclosure are synonyms defined as:

envelopment and inclosure: the act of enclosing something inside something else

Other synonyms of envelopment include enclosing, enclosure.

envelopment (noun)	inclosure (noun)
the act of enclosing something inside something else	the act of enclosing something inside something else
	something (usually a supporting document) that is enclosed in an envelope with a covering letter