insignificant vs flimsy

insignificant is not a noun while flimsy is a noun.

Word	Noun	Adjective	Verb	Adverb
insignificant	No	Yes	No	No
flimsy	Yes	Yes	No	No

insignificant (noun)	flimsy (noun)
	a thin strong lightweight translucent paper used especially for making carbon copies

insignificant (adjective)	flimsy (adjective)
devoid of importance, meaning, or force	not convincing
signifying nothing	lacking solidity or strength
of little importance or influence or power; of minor status	lacking substance or significance
small and unimpressive