goofy vs wacky

goofy and wacky both are adjectives.

Word	Noun	Adjective	Verb	Adverb
goofy	No	Yes	No	No
wacky	No	Yes	No	No

As adjectives, goofy and wacky are synonyms defined as:

Other synonyms of goofy include silly, whacky, zany.

goofy (adjective)	wacky (adjective)
ludicrous, foolish	ludicrous, foolish
	informal or slang terms for mentally irregular