| serious(expression, adjective, severity, earnest, harshness) |
| earnest(noun, expression, adjective, cool, cold) |
| grave(expression, adjective, severity, earnest, harshness) |
| important(adjective, importance, significance, consequence, eminence) |
| heavy(adjective, severity, earnest, harshness) |
| significant(adjective, importance, significance, consequence, eminence) |
| sophisticated(adjective, severity, sophistication, harshness, grievousness) |
| thoughtful(adjective, happy, careless, sober, superficial) |
| austere(adjective, hard, severe, harsh, stern) |
| severe(expression, adjective, hard, harsh, severity) |
| hard(adjective, severe, harsh, severity, stern) |
| unimpassioned(adjective, upset, light, happy, sober) |
| sober(adjective, upset, light, frivolous, disciplined) |
| weighty(adjective, severity, sophistication, harshness, grievousness) |
| heartrending(adjective, severity, sophistication, harshness, grievousness) |
| burdensome(adjective, severity, sophistication, harshness, grievousness) |
| critical(expression, adjective, severity, earnest, harshness) |
| grievous(adjective, severity, sophistication, harshness, grievousness) |
| profound(adjective, importance, significance, consequence, eminence) |
| rigid(adjective, hard, severe, harsh, stern) |