UNGRATEFUL /ʌnˈɡɹeɪtfəl/ Scrabble 14 Words With Friends 19 Definition adjective not feeling or showing gratitude. — synonyms: thankless, unthankful adjective disagreeable. See all 361 words you can make from UNGRATEFUL → 10-letter words Words starting with U Words ending with L ← Unscramble different letters