envelopment vs enclosing

envelopment and enclosing both are nouns.

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

As nouns, envelopment and enclosing are synonyms defined as:

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

Other synonyms of envelopment include enclosure, inclosure.

envelopment (noun)	enclosing (noun)
the act of enclosing something inside something else	the act of enclosing something inside something else