Find Antonyms

supplementary Antonyms

Opposite of supplementary

Pinning down the opposite of supplementary requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
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• adjective (Context 1)

Provided in addition to what is already present or available in order to complete, enhance, or make up for a deficiency.

Usage Example

"The professor provided primary reading materials for students who wanted to explore the topic in greater depth."

Strongest
primary
Strong
main
core
principal
fundamental
essential

Similar words to supplementary

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

supplemental
supplement
additional
extra
auxiliary
addition
ancillary
adjunct
See all synonyms of supplementary

• Nearby Words

supplement
supplemental
supplementally
supplementary
supplementation
suppleness
supplicant

Cite this Entry

Wordmom. (2026). Antonyms for Supplementary. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/supplementary
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