1) If not 2) In a different manner 3) In another manner 4) In other respects or ways 5) In the alternative 6) Or else 7) Or else, if not 8) Other Found on https://www.crosswordclues.com/clue/otherwise
• (adv.) In different circumstances; under other conditions; as, I am engaged, otherwise I would accept. • (adv.) In other respects. • (adv.) In a different manner; in another way, or in other ways; differently; contrarily. Found on http://thinkexist.com/dictionary/meaning/otherwise/
Oth'er·wise` adverb [ Other + wise manner.] 1. In a different manner; in another way, or in other ways; differently; contrarily. Chaucer. « Thy father was a worthy prince, And merited, alas! a better fate; But Heaven thought otherwise .» Addison. Found on http://www.encyclo.co.uk/webster/O/40
under other circumstances: Otherwise they may get broken. · in another manner; differently: Under the circumstances, I can't believe otherwise. · in other respects: an otherwise happy life. Found on https://www.infoplease.com/dictionary/otherwise