c's, c.'s, c.s, cees, keas, kee's, kees, keese, key's, keyes, keyes', keys, saez, scheme, schemes, sea's, seas, sease, sees, seese, seize, sies, skase, skeat, skeel, skeels, skeen, skeens, skeet, skeete, skene, ski, skied, skies, sky's, sleaze, sneeze, speas, spease, spees, spiess, squeeze, stees, skis