flexible vs limber

flexible is not a noun while limber is a noun.

Word	Noun	Adjective	Verb	Adverb
flexible	No	Yes	No	No
limber	Yes	Yes	Yes	No

flexible (noun)	limber (noun)
	a two-wheeled horse-drawn vehicle used to pull a field gun or caisson

flexible (adjective)	limber (adjective)
able to flex; able to bend easily	(used of persons' bodies) capable of moving or bending freely
capable of being changed	(used of e.g. personality traits) readily adaptable
making or willing to make concessions	(used of artifacts) easily bent
able to adjust readily to different conditions
bending and snapping back readily without breaking

flexible (verb)	limber (verb)
	cause to become limber
	attach the limber