Find Antonyms
triennial Antonyms
Opposite of triennial
Pinning down the opposite of triennial requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
• adjective (Context 1)
Lasting for or occurring every three years.
Usage Example
"The international association holds a perennial conference to review global industry standards."
Strong
perennial
Similar words to triennial
Words similar to triennial shift depending on context. Common synonyms include:
triennium
Cite this Entry
Wordmom. (2026). Antonyms for Triennial. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/triennial