Synonyms of complementary

complementary

adjective

ˌkäm-plə-ˈmen-t(ə-)rē 

as in supplementary

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

the complementary contributions of the cooking and cleanup committees were essential to the success of the church barbecue

Synonyms & Similar Words

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

Antonyms & Near Antonyms

• nonreciprocal
• noncomplementary

Example Sentences

Recent Examples of complementary

Both sides of the island are necessary and complementary, just like the proverbial oyster grit that births the pearl. — Jonnie Bayfield, Condé Nast Traveler, 19 July 2026

But age limits and design reform are complementary tools in the same project. — Ravi Iyer, Time, 18 July 2026

But given the size of budget cuts in the formal humanitarian response system, these local initiatives can be better supported with complementary funding. — Peter Hailey, The Conversation, 16 July 2026

In response, Paramount argued that the Paramount and WBD cable lineups are complementary — and not market substitutes — and that cable providers will still want access to all of the channels. — Gene Maddaus, Variety, 16 July 2026