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supplementary Synonyms

Another word for supplementary

Choosing another word for supplementary depends on context, so the 11 synonyms and similar words below are separated across 2 exact definitions and ranked by match 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 supplemental reading materials for students who wanted to explore the topic in greater depth."

Strongest
supplemental
additional
Strong
extra
auxiliary
ancillary
secondary
add-on

• noun (Context 2)

An additional item, examination, question, or appropriation provided to supplement or complete something else.

Usage Example

"Students who missed the final exam due to illness were permitted to sit for a supplement in August."

Strongest
supplement
Strong
addition
adjunct
addendum

Opposites of supplementary

The opposite of supplementary shifts depending on context. Common opposites include:

primary
main
core
principal
fundamental
essential
See all opposites of supplementary

• Nearby Words

supplement
supplemental
supplementally
supplementary
supplementation
suppleness
supplicant

Cite this Entry

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