Uphill (Adjective) - कठिन/चढ़ने वाला
Synonyms:Difficult, Laborious, Tough, Wearisome.

Urgent (Adjective) - आवश्यक
Synonyms:Compelling, Critical, Crucial, Eager.

Utmost (Adjective) - अत्यंत/सर्वाधिक
Synonyms:Extreme, Final, First, Farthest.

Utterance (Noun) - उच्चारण/अंतिम प्रयास या परिणाम
Synonyms:Announcement, Statement, Declaration, Speech.