contagious vs communicable

contagious and communicable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
contagious	No	Yes	No	No
communicable	No	Yes	No	No

As adjectives, contagious and communicable are synonyms defined as:

contagious and communicable: (of disease) capable of being transmitted by infection

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

contagious (adjective)	communicable (adjective)
(of disease) capable of being transmitted by infection	readily communicated
easily diffused or spread as from one person to another	(of disease) capable of being transmitted by infection