Real Dictionary

otherwise
adverb: You use otherwise after stating a situation or fact, in order to say what the result or consequence would be if this situation or fact was not the case.

otherwise in American English
in another manner; differently
adjective: other or different; of another nature or kind
adverb: under other circumstances
conjunction: or else; if not

otherwise in British English
adjective: of an unexpected nature; different
adverb: differently
pronoun: something different in outcome
sentence connector: or else; if not, then