Synonyms For "Strong" :
1 syllable:
firm, hard, sound, stiff, tough, warm
2 syllables:
beardown, brawny, bullnecked, hefty, intense, knockout, potent, robust, rugged, secure, severe, solid, strengthened, toughened, virile
3 syllables:
bullocky, fortified, ironlike, muscular, powerful, reinforced, sinewy, substantial, vehement