expandable vs elastic

expandable is not a noun while elastic is a noun.

Word	Noun	Adjective	Verb	Adverb
expandable	No	Yes	No	No
elastic	Yes	Yes	No	No

expandable (noun)	elastic (noun)
	a fabric made of yarns containing an elastic material
	a narrow band of elastic rubber used to hold things (such as papers) together

expandable (adjective)	elastic (adjective)
(of gases) capable of expansion	capable of resuming original shape after stretching or compression; springy
able to expand or be expanded	able to adjust readily to different conditions