9-Letter Words Starting: OPTO There are 3 9-letter words, 0 9-letter phrases and 0 9-letter abbr's that start with OPTO. Did you mean: All 9 letter words All words starting with OPTO Ending with OPTO Containing OPTOBest Scoring for Word GamesTop 10Top 10 (Default)Top 20Top 50Top 100 Scr US AllScrabble US (Default)Scrabble EUWW FriendsWordFeud All All (Default)VerbNounAdjectiveAdverbWordSaveLengthUsagePointsTypeoptometry916 nounnnoun • the practice of an optometristoptometer913 nounnnoun • An instrument for measuring the focus of the lens of the eye. Tip: Scrabble EU allows far more words than US! Also change the max length to see more words. All 9 Letter Words Most Common ASC Word A-ZWord Z-AMost Common ASC (Default)Most Common DESCScrabble Points Hi-LoScrabble Points Lo-HiWWF Points Hi-LoWWF Points Lo-HiWordFeud Points Hi-LoWordFeud Lo-HiWords (3)optometry 16optometer 13optophone 16