| rough(adjective, severity, sophistication, harshness, grievousness) |
| solemn(expression, adjective, severity, earnest, harshness) |
| stern(adjective, hard, severe, harsh) |
| tough(adjective, severity, sophistication, harshness, grievousness) |
| sincere(adjective, false, sober, disciplined, insincere) |
| arduous(adjective, severity, sophistication, harshness, grievousness) |
| complicated(adjective, severity, sophistication, harshness, grievousness) |
| difficult(adjective, severity, sophistication, harshness, grievousness) |
| hardboiled(adjective, upset, light, sober, disciplined) |
| harsh(adjective, hard, severe, stern) |
| involved(adjective, importance, significance, consequence, eminence) |
| laborious(adjective, severity, sophistication, harshness, grievousness) |
| momentous(adjective, importance, significance, consequence, eminence) |
| operose(adjective, severity, sophistication, harshness, grievousness) |
| somber(adjective, light, bright, sober, disciplined) |
| strict(adjective, hard, severe, harsh, stern) |
| unexcited(adjective, light, happy, sober, disciplined) |
| businesslike |
| grim(adjective, severity, sophistication, harshness, grievousness) |
| heavyweight(adjective, severity, sophistication, harshness, grievousness) |