confirmatory

adjective

con·​fir·​ma·​to·​ry kən-ˈfər-mə-ˌtȯr-ē 

: serving to confirm : corroborative

a confirmatory test

Synonyms of confirmatory

• confirming
• supporting
• supportive
• confirmational
• corroborative
• supplementary
• verifying
• substantiating

Examples of confirmatory in a Sentence

a confirmatory test for pregnancy

Recent Examples on the Web

While Denali is conducting a phase 2/3 trial to confirm clinical benefit in a larger cohort of patients, including participants up to age 26, these confirmatory trials can take years to complete. —Nathan Grant, STAT, 14 Apr. 2026

While the period leading up to the LOI does include a less robust form of due diligence that’s primarily about looking for red flags, confirmatory due diligence involves digging into the inner workings of a company to make sure every assumption in the LOI is verified. —Frank Williamson, Forbes.com, 8 Apr. 2026

In 2020: The Food and Drug Administration no longer required the Centers for Disease Control and Prevention to conduct confirmatory testing for positive COVID-19 diagnoses. —Arizona Republic, AZCentral.com, 12 Mar. 2026

More frequently, though, my winter surprises have been confirmatory rather than revelatory. —Daniel Fienberg, HollywoodReporter, 24 Feb. 2026

Word History

First Known Use

1636, in the meaning defined above

Rhymes for confirmatory

• accusatory
• admonitory
• ambulatory
• amendatory
• celebratory
• circulatory
• combinatory
• commendatory
• compensatory
• condemnatory
• confiscatory
• consolatory