What are some abstract nouns starting with U?

An abstract noun is a Word for something that can't be experienced by any of the five physical senses; something that can't be seen, heard, smelled, tasted, or touched. An abstract noun is a Word for something that is known, learned, thought, understood, or felt emotionally.

Examples of abstract nouns that start with U are:

• ubiquity
• ugliness
• ultimatum
• umbrage
• upheaval
• upkeep
• uprising
• urge
• urgency
• use