· useful
· valuable
· thoughtful · unselfish
erraticuseless
adjectives that begin with the letter U areuglyunctuousunderratedundiplomaticunbelievableunstoppableurgentusefuluselessuncomfortableUltraUltraconservativeUltramarineUltramodernUmberUmbilicalUnitedUniversalUnjustUnkindUnknowingUnknownUnlawfulUnlikeUnlikelyUnluckyUnlimited
jitterykindheartedmagnificentnaughtyoptimisticquestionableunderstandingwisexenophobiczesty
UniformeUnilatéralUniqueUltimeUrbainUtile
unbiased
unforgettable
unending,
· unequaled
· unpredictable
unafraidunassistedunassumingunbelievableunbiasedunderstandingunforgettableuniqueunselfishupbeatuseful
Urgenia, Xeranthemum and Zinnia are flowers. They begin with letters U X and Z.