UNHAPPY—miserable, wretched, distressed, painful, afflicted, disastrous, drear, dismal. (Happy.)
UNIFORM—regular, symmetrical, equal, even, alike, unvaried. (Irregular.)
UNINTERRUPTED—continuous, perpetual, unceasing, incessant, endless. (Intermittent.)
UNION—junction, combination, alliance, confederacy, league, coalition, agreement. (Disunion.)
UNIQUE—unequal, uncommon, rare, choice, matchless. (Common, ordinary.)
UNITE—join, conjoin, combine, concert, add, attach. (Separate, disrupt, sunder.)
UNIVERSAL—general, all, entire, total, catholic. (Sectional.)
UNLIMITED—absolute, undefined, boundless, infinite. (Limited.)
UNREASONABLE—foolish, silly, absurd, preposterous, ridiculous.
UNRIVALED—unequaled, unique, unexampled, incomparable, matchless. (Mediocre.)