LINCHPIN /ˈlɪnt͡ʃˌpɪn/ Scrabble 15 Words With Friends 19 Definition noun a central cohesive source of support and stability. — synonyms: anchor, mainstay, keystone, backbone, lynchpin noun pin inserted through an axletree to hold a wheel on. — synonyms: lynchpin See all 33 words you can make from LINCHPIN → 8-letter words Words starting with L Words ending with N ← Unscramble different letters