Synonyms of supplemental

supplemental

adjective

ˌsə-plə-ˈmen-tᵊl 

1

as in auxiliary

available to supply something extra when needed

the new program will provide supplemental health insurance to thousands of workers

Synonyms & Similar Words

• auxiliary
• additional
• supplementary
• accessory
• peripheral
• makeshift
• accessorial
• appurtenant
• complementary
• added
• further
• backup
• supportive
• assistant
• contributory
• assisting
• another
• substitute
• excess
• subordinate
• secondary
• subsidiary
• surplus
• tributary
• superfluous
• nonessential
• helping
• adjuvant
• unessential
• dispensable
• subservient

Antonyms & Near Antonyms

• main
• principal
• chief
• basic
• primary
• fundamental
• necessary
• prime
• essential
• integral
• vital
• required
• imperative
• requisite
• needed
• all-important
• indispensable
• needful

2

as in supplementary

related to each other in such a way that one completes the other

an astronomer who regards science and religion not as antithetical but as supplemental belief systems

Synonyms & Similar Words

• supplementary
• complementary
• reciprocal
• mutual
• collective
• correlative
• combined
• communal
• cooperative
• joint
• symbiotic
• common
• shared
• conjoint
• united

Antonyms & Near Antonyms

• nonreciprocal
• noncomplementary

Example Sentences

Recent Examples of supplemental

The league also took a hard, public stance in the Brendan Sorsby situation by denying the former Texas Tech quarterback entry to the supplemental draft. — Saad Yousuf, New York Times, 9 Sep. 2026

If root rot is the culprit, amend the soil to improve drainage and cut back on supplemental watering. — The Spruce, 8 Sep. 2026

Plus, one of the Legislature’s last acts last week was to send Newsom a bloated supplemental budget bill containing more than $3 billion in spending, including countless stacks of pork sought by lawmakers for their districts. — Los Angeles Times, 7 Sep. 2026

These rejections include supplemental health benefits, a night shift differential, geographic pay differential, a recruitment and retention proposal, seniority differential and overtime meal benefits, according to the complaint. — Corey Schmidt, Sacbee.com, 7 Sep. 2026