(obsolete) A mountain. / (chiefly Britain) A hill. / A mound of earth and stones raised over a grave or graves. / (mining) A heap of rubbish, attle, or other such refuse.

(aviation) Acronym of no tail rotor, a helicopter anti-torque system which replaces the use of a tail rotor.

(philosophy, uncountable) A systematic method of argument that attempts to resolve the contradictions in opposing views or ideas.

(archaic) simple past tense and past participle of prepare