like crazy vs like thunder

like crazy and like thunder both are adverbs.

Word	Noun	Adjective	Verb	Adverb
like crazy	No	No	No	Yes
like thunder	No	No	No	Yes

As adverbs, like crazy and like thunder are synonyms defined as:

like crazy and like thunder: (informal) with great speed or effort or intensity; used for emphasis

Other synonyms of like crazy include like hell, like mad, like sin, like the devil.

like crazy (adverb)	like thunder (adverb)
(informal) with great speed or effort or intensity; used for emphasis	(informal) with great speed or effort or intensity; used for emphasis