contractable vs catching

contractable is not a noun while catching is a noun.

Word	Noun	Adjective	Verb	Adverb
contractable	No	Yes	No	No
catching	Yes	Yes	No	No

As adjectives, contractable and catching are synonyms defined as:

contractable and catching: (of disease) capable of being transmitted by infection

Other synonyms of contractable include communicable, contagious, transmissible, transmittable.

contractable (noun)	catching (noun)
	(baseball) playing the position of catcher on a baseball team
	the act of detecting something; catching sight of something
	becoming infected

contractable (adjective)	catching (adjective)
(of disease) capable of being transmitted by infection	(of disease) capable of being transmitted by infection