changeful vs erratic

changeful and erratic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
changeful	No	Yes	No	No
erratic	No	Yes	No	No

changeful (adjective)	erratic (adjective)
such that alteration is possible; having a marked tendency to change	liable to sudden unpredictable change
	likely to perform unpredictably
	having no fixed course