NONAGENARIAN /ˌnɒnæd͡ʒɛˈnɛːɹɪən/ Scrabble 13 Words With Friends 18 Definition noun someone whose age is in the nineties. adjective being from 90 to 99 years old. See all 183 words you can make from NONAGENARIAN → 12-letter words Words starting with N Words ending with N ← Unscramble different letters