SIXTIETH /ˈsɪksti.əθ/ ► audio Scrabble 18 Words With Friends 17 Definition adjective the ordinal number of sixty in counting order. — synonyms: 60th noun position 60 in a countable series of things. noun one part in sixty equal parts. — synonyms: one-sixtieth See all 65 words you can make from SIXTIETH → 8-letter words Words starting with S Words ending with H ← Unscramble different letters