| imperative(strong, overwhelming, uncontrollable) |
| impregnable |
| in force(expression, good, sound, right, reasonable) |
| industrious(adjective, strong, moving, lively, active) |
| inviolable |
| loaded |
| magnetic(adjective, energetic, lively, active, vigorous) |
| main |
| manlike(adjective, muscular, manly, masculine) |
| masterful(adjective, powerful, authoritative) |
| normal(strong, tough, fit, fresh, well) |
| official(good, sound, right, reasonable, rational) |
| power(strong, energetic, active, vigorous, controlling) |
| powerhouse(adjective, strong, great, direct, tough) |
| preeminent(strong, energetic, outstanding, worthy, notable) |
| profitable(tough, energetic, effective, adept, effectual) |
| prominent(strong, important, powerful, outstanding, effective) |
| rational(sound, reasonable, forceful, persuasive, convincing) |
| reasonable(sound, rational) |
| robustious(strong, tough, fit, healthy, well) |