thunderbolt vs bombshell

thunderbolt and bombshell both are nouns.

Word	Noun	Adjective	Verb	Adverb
thunderbolt	Yes	No	No	No
bombshell	Yes	No	No	No

As nouns, thunderbolt and bombshell are synonyms defined as:

Other synonyms of thunderbolt include thunderclap.

thunderbolt (noun)	bombshell (noun)
a shocking surprise	an explosive bomb or artillery shell
a discharge of lightning accompanied by thunder	a shocking surprise
	an entertainer who has a sensational effect