| unbearable(adjective, severe, awful, terrible, painful) |
| unconventional(adjective, unusual, special, sophisticated, rare) |
| unendurable(adjective, severe, painful, endured, insufferable) |
| aching(adjective, painful, sickness, ache, anguishes) |
| arduous(adjective, painful, sickness, ache, anguishes) |
| biting(adjective, strong, severe, harsh, tender) |
| caustic(adjective, strong, harsh, tender, intense) |
| consummation(noun, limit, edge, boundary, ultimate) |
| crest(noun, limit, ultimate) |
| cruel(adjective, hard, tough, severe, harsh) |
| depth(noun, force, end, power, passion) |
| disproportionate(adjective, unreasonable, improper, extravagant, excessive) |
| distant(adjective, remote) |
| far-off(adjective, end, remote, past, ending) |
| farthermost(adjective, adverb, big, last, edge) |
| foul(adjective, endured) |
| hard(adjective, strong, great, tough, severe) |
| harrowing(adjective, severe, tender, awful, raw) |
| height(noun, limit, edge, boundary, ultimate) |
| hideous(adjective, expensive, high-priced, pricey, endured) |