ZILLION /ˈzɪljən/ ► audio Scrabble 16 Words With Friends 19 Definition adjective very large indeterminate number. noun a very large indefinite number (usually hyperbole). — synonyms: million, billion, trillion, jillion, gazillion, bazillion See all 18 words you can make from ZILLION → 7-letter words Words starting with Z Words ending with N ← Unscramble different letters