unharmonious, a. inharmonious, discordant, dissonant, harsh.

unhealable, a. insanable, incurable.

unhealthful, a. unwholesome, insalubrious, unsanitary, unhealthy, morbific, pestiferous.

unhealthfulness, n. insalubrity, unwholesomeness.

unhealthy, a. unhealthful, unwholesome, insalubrious, noxious, noisome, pestiferous, pernicious, unsanitary, unhygienic, morbid, morbific, pestilent, insalutary; sickly, unsound, diseased, morbid, invalid.

unheard of. unprecedented, exceptional; unknown, obscure.

unheeded, a. disregarded, ignored, unnoticed.

unholy, a. unhallowed, unconsecrated, profane, impious, evil, ungodly.

unhonored, a. inglorious, unsung, unrenowned, obscure.

unhurt, a.  See unharmed.

uniform, a. unvarying, invariable, constant, undeviating; consonant, consistent.  Antonyms:  diverse, difform, anomalous, variant, heterogeneous, variable.

uniform, n. livery, dress, regimentals.

uniformity, n. sameness, even tenor; invariability, regularity, equableness, conformity, consonance, consistency.  Antonyms:  diversity, variation, anomaly.

unimaginative, a. matter-of-fact, prosaic, literal, practical, unromantic.

unimportance, n. immateriality, insignificance, triviality, paltriness.

unimportant, a. immaterial, insignificant, trivial, paltry.

unimpressible, a. unimpressionable, impassible, stoical, impassive.

unintentional, a. accidental, unpremeditated, fortuitous, undesigned.

union, n. coalition, combination, merger, fusion, unification, incorporation, conjunction, amalgamation, coalescence, junction, league, confederacy, federation, alliance; agreement, concurrence, unison.  Antonyms:  disunion.  See separation.

unique, a. unmatched, unexampled.

unite, v. join, combine, annex, associate, link, couple, yoke, splice; consolidate, merge, amalgamate, fuse, confederate, unify, coalesce, concur, cooeperate.

united, a. combined, incorporate, federated, confederate, affiliated, unified, blended, leagued, conjugate, yoked, amalgamated.

unity, n. oneness, singleness; concord, harmony, agreement, uniformity, unison, concert.

universal language. pasilaly; Esperanto.

universal writing. pasigraphy.

unjust, a. unfair, inequitable, iniquitous, unmerited.

unjustifiable, a. indefensible, inexcusable, unwarrantable.

unkind, a. cruel, harsh, austere, rigorous, incompassionate, inclement, brutal.

unkindness, n. cruelty, brutality, severity, incompassion, incivility, disfavor.

unknowable, a. incognizable, incognoscible, unascertainable, unintelligible, incomprehensible.

unknowingly, adv. unwittingly, ignorantly, unconsciously, inadvertently.

unknown, a. obscure, inglorious, unrenowned, nameless, undistinguished; unascertained, unexplored, unapprehended; anonymous.