| empirical(adjective, adverb, reasonable, sensible) |
| tentative(adjective, counterfeit, near, reserve) |
| trial(adjective, start, unsettled, temporary) |
| experiential(adjective, fresh, trial, factual) |
| test(adjective, start, unsettled, trial) |
| provisional(adjective, near, unsettled, extra) |
| pilot(adjective, start, trial, untried) |
| innovative(adjective, modern, pioneering, trailblazing) |
| probationary(adjective, fresh, unsettled, trial) |
| exploratory(adjective, unsettled, trial, penetrating) |
| original |
| developmental(adjective, fresh, trial, untried) |
| new(adjective, trial, modern, inexperienced) |
| preliminary(adjective, trial, untried, tentative) |
| temporary(adjective, unsettled, extra, trial) |
| unconventional(adjective, modern, pioneering, trailblazing) |
| avant-garde(adjective, modern, first, early) |
| revolutionary(adjective, pioneering, trailblazing, secretive) |
| trial-and-error(adjective, fresh, trial, untried) |
| pioneering(adjective, modern, trailblazing, cutting-edge) |