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Synonyms for experimental

modified

tentative, trial, test, probationary, experiential, provisional, empirical, preliminary, pilot, preparatory, under probation, on approval, on trial, pending verification, temporary, beginning, unconcluded, unproved, speculative, laboratory, exploratory, probative, innovative, in its first stage, in the model stage.

Antonyms established*, tried, tested.

See experimental in Webster's New World Roget's A-Z Thesaurus II

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