Synonyms of ultra

ultra

adjective

ˈəl-trə 

as in extreme

being very far from the center of public opinion

espouses a kind of ultra conservatism that even some members of his own party cannot support

Synonyms & Similar Words

• extreme
• radical
• rabid
• revolutionary
• fanatic
• extremist
• violent
• subversive
• revolutionist
• wild
• reactionary

Antonyms & Near Antonyms

• conservative
• moderate
• traditional
• conventional
• middle-of-the-road
• temperate
• nonrevolutionary
• unrevolutionary
• progressive
• orthodox
• liberal

Example Sentences

Recent Examples of ultra

As air occupies most of this porous network, heat transfer slows, allowing the aerogel to demonstrate low thermal conductivity in lab tests and proving its potential as an ultra-lightweight thermal insulator. — Mrigakshi Dixit, Interesting Engineering, 19 Aug. 2026

Swift was designed to study gamma-ray bursts, the most powerful explosions in the universe, which are triggered by cosmic events like the births of black holes and collisions between ultra-dense stars at the ends of their lives. — Denise Chow, NBC news, 19 Aug. 2026

Allegiant Air, marketed to travelers as an ultra-low-cost airline, announced the latest additions to its service Monday. — Carla Mendez, Miami Herald, 19 Aug. 2026

As a result, many investors are turning to short-term investments , particularly ultra-short bond funds, amid persistent concerns that long-term bonds are no longer providing portfolio diversification. — Joseph Wilkins, CNBC, 19 Aug. 2026

Phrases Containing ultra

• ne plus ultra