| rigorous(adjective, strong, hard, tough, severe) |
| stringent(adjective, tough, severe, firm, harsh) |
| unrelenting(adjective, mean, strong, hard, tough) |
| unsympathetic(adjective, person, mean, tough, severe) |
| austere(adjective, strong, hard, tough, severe) |
| brutal(adjective, person, tough, severe, harsh) |
| copious(adjective, grand, extravagant, generous, lavish) |
| hard-hearted |
| heartless(adjective, mean, severe, harsh, cruel) |
| hospitable(adjective, good, kind, reasonable, fair) |
| inflexible(adjective, strong, hard, tough, severe) |
| large(adjective, substantial, generous) |
| obdurate(adjective, close, strong, hard, tough) |
| open |
| plentiful(adjective, substantial, grand, extravagant, generous) |
| rigid(adjective, strong, hard, tough, severe) |
| too-generous |
| unfeeling(adjective, person, mean, tough, severe) |
| benevolent(adjective, good, kind, reasonable, fair) |
| bighearted(kind, generous, prodigal) |