hapax legomenon /hapˈaks le-gomˈə-non/ (Greek)

1. (literally) said once
2. A word or phrase that is found once only

• k.o.'s
• k.o.s
• kos
• KO's
• KOs
• Kos
• kosher
• koshered
• koshering
• koshers
• kosmos
• Kosovar
• Kosovars
• koss
• koto
• kotos
• kotow
• kotowed
• kotowing
• kotows
• kottabos
• kotwal
• kotwals
• koulan
• koulans