| stabile(adjective, calm, strong, secure, firm) |
| stable(adjective, strong, firm, solid, steady) |
| stalwart(adjective, calm, strong, solid, steady) |
| stated(adjective, firm, determined, usual, regular) |
| stationary(adjective, calm, strong, solid, steady) |
| staunch(adjective, calm, strong, secure, firm) |
| staying put(expression, adjective, calm, strong, substantial) |
| steadfast(adjective, calm, strong, secure, firm) |
| steady(adjective, calm, strong, secure, firm) |
| stiff-necked(adjective, firm, determined, usual, regular) |
| stipulated(adjective, firm, determined, usual, regular) |
| stout(adjective, calm, strong, solid, steady) |
| strong(adjective, calm, great, sound, fit) |
| strong as an ox(expression, adjective, idiom, strong, great) |
| sturdy(adjective, calm, strong, secure, firm) |
| substantial(adjective, calm, strong, secure, firm) |
| sure(adjective, calm, strong, secure, firm) |
| tenacious(adjective, strong, solid, stable, sure) |
| tight(adjective, strong, solid, stable, sure) |
| together(adjective, calm, strong, great, right) |