| apt | natural, predictable, plausible, to be expected |
| colour | explain, make plausible, excuse |
| colourable | capable of being interpreted in many ways, conveniently plausible |
| fair | plausible, flattering, seductive |
| mountebank | win over by plausible trickery |
| plausive | plausible, convincing, believable |
| probable | plausible, believable, likely sounding |
| simular | simulated, pretended, fake; or: plausible |
| smooth | adopt a flattering manner, make a plausible show, conciliate |
| smooth | plausible, glib, apparently amiable |
| smooth-faced | plausible, bland, glib, deceitful |
| smoothing | flattering, plausible, ingratiating |
| well-seeming | attractively looking, presenting a plausible appearance |