| hard(adjective, set, strong, great, tough) |
| inexorable(adjective, strong, hard, tough, resolution) |
| insistent(adjective, resolute, tenacious) |
| overwhelming(adjective, strong, great, strength, tough) |
| powerful(adjective, strong, great, tough, difficult) |
| ruthless(adjective, resolute, steadfast, unyielding) |
| steady(adjective, strong, firm, determined, resolution) |
| stout(adjective, strong, powerful, noble, bold) |
| tough(adjective, strong, hard, great, difficult) |
| unafraid(adjective, strong, tough, determined, vigorous) |
| all-conquering |
| constant(adjective, strong, firm, determined, steady) |
| decided(adjective, resolution, resolute) |
| defiant(strong, bold, persistent, spirited, obstinate) |
| faithful(adjective, resolute, tenacious) |
| formidable(adjective, difficult, overwhelming) |
| headstrong(adjective, tough, violent, wild, awkward) |
| heroic(adjective, strong, bold, resolute, spirited) |
| irrepressible |
| mettlesome(adjective, courageous, fearless, plucky) |