Adjectives

(a)stronghaving strength or power greater than average or expected“a strong radio signal”, “strong medicine”, “a strong man”
(s)strongnot faint or feeble“a strong odor of burning rubber”
(s)potent, stronghaving or wielding force or authority“providing the ground soldier with increasingly potent weapons”
(a)potent, strong, stiffhaving a strong physiological or chemical effect“a potent toxin”, “potent liquor”, “a potent cup of tea”, “a stiff drink”
(s)impregnable, inviolable, secure, strong, unassailable, unattackableimmune to attack; incapable of being tampered with“an impregnable fortress”, “fortifications that made the frontier inviolable”, “a secure telephone connection”
(s)solid, strong, substantialof good quality and condition; solidly built“a solid foundation”, “several substantial timber buildings”
(s)strongof verbs not having standard (or regular) inflection“‘sing’ is a strong verb”
(s)hard, strongbeing distilled rather than fermented; having a high alcoholic content“hard liquor”
(s)strong, warmfreshly made or left“a warm trail”, “the scent is warm”
(s)firm, strongstrong and sure“a firm grasp”, “gave a strong pull on the rope”