SEVENTIETH /ˈsɛvnti.əθ/ ► audio Scrabble 16 Words With Friends 17 Definition adjective the ordinal number of seventy in counting order. — synonyms: 70th noun position 70 in a countable series of things. Examples “All the septuagenarians remembered their seventieths fondly.” See all 182 words you can make from SEVENTIETH → 10-letter words Words starting with S Words ending with H ← Unscramble different letters