| credible(adjective, sound, reasonable, sensible, rational) |
| deniable(adjective, uncertain) |
| in question(expression, adjective, unsettled, undecided) |
| indecisive(adjective, uncertain, doubtful, unsettled, vague) |
| plausible(adjective, sound, reasonable, sensible, rational) |
| suspect(adjective, uncertain, doubtful, dubious, tricky) |
| tenable(adjective, sound, reasonable, sensible, rational) |
| controvertible |
| doubtable |
| suspicious(adjective, uncertain, doubtful, dubious, unsure) |
| ambivalent(adjective, uncertain) |
| at issue(expression, adjective, doubtful, dubious, questionable) |
| conceivable(adjective, tenable) |
| confutable |
| dubitable(adjective, uncertain, doubtful, unsettled, dubious) |
| imaginable(adjective, conceivable, tenable) |
| in dispute |
| in doubt(expression, adjective, uncertain, doubtful, unsure) |
| precarious(adjective, uncertain, tricky, sticky, challenging) |
| rational(adjective, sound, reasonable, sensible, intelligent) |