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

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

• blissful
• blissfully
• blissfulness
• blissfulnesses
• blissless
• blist
• B-list
• blister
• B-lister
• blister beetle
• blister beetles
• blister card
• blister cards
• blister copper
• blister coppers
• blistered
• blistered-steel
• blister fly
• blisterier
• Boolean
• Boolean algebra
• Boolean algebras
• Boolean expression
• Boolean expressions
• boom