| smart(adjective, sensible, stupid, thoughtful, sober) |
| intelligent(adjective, reasonable, careful, sober, serious) |
| sober(adjective, serious, earnest, serious-minded, unfrivolous) |
| sane(adjective, reasonable, careful, intelligent, sober) |
| sensible(adjective, smart, thoughtful, sober, serious) |
| earnest(adjective, sober, serious, serious-minded, unfrivolous) |
| serious(adjective, sober, earnest, serious-minded, unfrivolous) |
| serious-minded(adjective, sober, serious, earnest, unfrivolous) |
| thoughtful(adjective, smart, sensible, sober, serious) |
| unfrivolous(adjective, sober, serious, earnest, serious-minded) |
| brainy(adjective, sober, serious, earnest, serious-minded) |
| responsible(adjective, sober, serious, earnest, serious-minded) |
| melancholy(adjective, sober, serious, earnest, serious-minded) |
| dignified(adjective, sober, serious, earnest, serious-minded) |
| grave(adjective, sober, serious, earnest, serious-minded) |
| heavy(adjective, sober, serious, earnest, serious-minded) |
| no-nonsense(adjective, sober, serious, earnest, serious-minded) |
| sedate(adjective, sober, serious, earnest, serious-minded) |
| severe(adjective, sober, serious, earnest, serious-minded) |
| solemn(adjective, sober, serious, earnest, serious-minded) |