preparedness vs readiness

preparedness and readiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
preparedness	Yes	No	No	No
readiness	Yes	No	No	No

As nouns, preparedness and readiness are synonyms defined as:

preparedness and readiness: the state of having been made ready or prepared for use or action (especially military action)

Other synonyms of preparedness include preparation.

preparedness (noun)	readiness (noun)
the state of having been made ready or prepared for use or action (especially military action)	prompt willingness
	a natural effortlessness
	(psychology) being temporarily ready to respond in a particular way
	the state of having been made ready or prepared for use or action (especially military action)