PORTENTOUS /pɔː(ɹ)ˈtɛntəs/ ► audio Scrabble 12 Words With Friends 15 Definition adjective of momentous or ominous significance. — synonyms: prodigious adjective ominously prophetic. — synonyms: fateful, foreboding(a) adjective puffed up with vanity. — synonyms: grandiloquent, overblown, pompous, pontifical See all 491 words you can make from PORTENTOUS → 10-letter words Words starting with P Words ending with S ← Unscramble different letters