nudge, v. poke (with the elbow).

nugatory, a. [futile], ineffectual, [unavailing]. See vain.

nuisance, n. [plague], [pest], bane, infliction, [bore], [offense].

null, a. [invalid], [nugatory].

nullification, n. [invalidation], [abrogation], [cancellation], [repeal].

nullify, v. [invalidate], [abrogate], [cancel], [repeal], [countermand].

numb, a. deadened, [unfeeling], [insensible], [benumbed].

numb, v. [benumb], [deaden].

number, v. enumerate; figure up, [count], numerate.

number, n. numeral, [figure], digit, integer; [collection], [multitude].