S: (adj) powerful (having great power or force or potency or effect) "the most powerful government in western Europe"; "his powerful arms"; "a powerful bomb"; "the horse's powerful kick"; "powerful drugs"; "a powerful argument"
S: (adj) robust (sturdy and strong in form, constitution, or construction) "a robust body"; "a robust perennial"
S: (adj) rugged (sturdy and strong in constitution or construction; enduring) "with a house full of boys you have to have rugged furniture"
S: (adj) strong (not faint or feeble) "a strong odor of burning rubber"
S: (adj) potent, strong (having or wielding force or authority) "providing the ground soldier with increasingly potent weapons"
S: (adj) potent, strong, stiff (having a strong physiological or chemical effect) "a potent toxin"; "potent liquor"; "a potent cup of tea"; "a stiff drink"
S: (adj) impregnable, inviolable, secure, strong, unassailable, unattackable (immune to attack; incapable of being tampered with) "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
S: (adj) solid, strong, substantial (of good quality and condition; solidly built) "a solid foundation"; "several substantial timber buildings"
S: (adj) strong (of verbs not having standard (or regular) inflection) "`sing' is a strong verb"