enclose vs enclosure

enclose is not a noun while enclosure is a noun.

Word	Noun	Adjective	Verb	Adverb
enclose	No	No	Yes	No
enclosure	Yes	No	No	No

enclose (noun)	enclosure (noun)
	the act of enclosing something inside something else
	a structure consisting of an area that has been enclosed for some purpose
	something (usually a supporting document) that is enclosed in an envelope with a covering letter
	a naturally enclosed space

enclose (verb)	enclosure (verb)
place, fit, or thrust (something) into another thing
surround completely
enclose or enfold completely with or as if with a covering
close in