Synonyms and related words :
conjectural, cut-and-try, determined, developmental, empirical, experiential, exploratory, heuristic, hit-or-miss, hypothetical, pilot, preliminary, preparatory, probationary, probative, probatory, proving, provisional, resolute, speculative, temporary, tentative, test, testing, theoretical, trial, trial-and-error, trying, venturesome, verificatory, willing