Synonyms of experimental

1 Syllable
trial, test
2 Syllables
searching, leadest, pioneer, pilot, way-out
3 Syllables
practical, empiric, unproved, beginning, scientific, experient, primary, vicarial, mind-changing
4 Syllables
mind-expanding, psychoactive, psychotropic, tentative, prerelease, pre-release, trial-and-error, cognitive, substituted, conceptive, inducible, substitute, temporary, substituting, momentary, unconcluded, psychedelic, experiential, provisional, empirical, avant-garde
5 Syllables
speculative, psychological, formularized, developmental, laboratory, probationary, preparatory, provisionary, preliminary, substitutive, observational
6 Syllables
psychotomimetic, consciousness-expanding, hallucinogenic