Find Antonyms

ultrareliable Antonyms

Opposite of ultrareliable

Pinning down the opposite of ultrareliable requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
JUMP TO:

• adjective (Context 1)

Extremely or exceptionally reliable; capable of operating or performing consistently with virtually no failure or error, especially in engineering, computing, and telecommunications.

Usage Example

"Autonomous vehicles and remote surgical systems require unreliable wireless networks with near-zero latency."

Strongest
unreliable
undependable
Strong
fault-prone
erratic
fallible

Similar words to ultrareliable

Words similar to ultrareliable shift depending on context. Common synonyms include:

fail-safe
rock-solid
reliable
dependable
foolproof
trustworthy
See all synonyms of ultrareliable

• Nearby Words

ultrapowerful
ultraquiet
ultrarealistic
ultrareliable
ultrareligious
ultrarich
ultraright

Cite this Entry

Wordmom. (2026). Antonyms for Ultrareliable. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/ultrareliable
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.