FOSSILIZE /ˈfɒs.ɪl.aɪz/ Scrabble 21 Words With Friends 22 Definition verb convert to a fossil. — synonyms: fossilise verb become mentally inflexible. — synonyms: fossilise See all 89 words you can make from FOSSILIZE → 9-letter words Words starting with F Words ending with E ← Unscramble different letters