contagious vs infectious

contagious and infectious both are adjectives.

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

contagious (adjective)	infectious (adjective)
(of disease) capable of being transmitted by infection	easily spread
easily diffused or spread as from one person to another	of or relating to infection
	caused by infection or capable of causing infection