| adjective | having strength or power greater than average or expected “a strong radio signal” |
| adjective | not faint or feeble “a strong odor of burning rubber” |
| adjective | having or wielding force or authority “providing the ground soldier with increasingly potent weapons” |
| adjective | having a strong physiological or chemical effect; ; ; , “a potent toxin” |
| adjective | immune to attack; incapable of being tampered with “an impregnable fortress” |
| adjective | of good quality and condition; solidly built “a solid foundation” |
| adjective | of verbs not having standard (or regular) inflection “`sing' is a strong verb” |
| adjective | being distilled rather than fermented; having a high alcoholic content “hard liquor” |
| adjective | freshly made or left “a warm trail” |
| adjective | strong and sure “a firm grasp” |
| potency | noun | the power or right to give orders or make decisions |
| impregnability | noun | having the strength to withstand attack |
| secureness | noun | the state of freedom from fear or danger |
| solidness | noun | the quality of being substantial or having substance |
| substantialness | noun | the quality of being substantial or having substance |