weak vs flimsy

weak is not a noun while flimsy is a noun.

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

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

weak (adjective)	flimsy (adjective)
wanting in physical strength	not convincing
overly diluted; thin and insipid	lacking solidity or strength
tending downward in price	lacking substance or significance
likely to fail under stress or pressure
lacking bodily or muscular strength or vitality
wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings
deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc
not having authority, political strength, or governing power
(used of verbs) having standard (or regular) inflection
deficient in intelligence or mental power
deficient or lacking in some skill
(used of vowels or syllables) pronounced with little or no stress