limber vs flexible

limber is a noun but flexible is not a noun.

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

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

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

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