levelheaded (adj.)
- assured
- balanced
- calm
- collected
- commonsense
- composed
- confident
- cool
- coolheaded
- dispassionate
- equable
- equanimous
- even
- even-tempered
- logical
- philosophical
- poised
- practical
- pragmatic
- rational
- reasonable
- reposeful
- sane
- self-assured
- self-confident
- self-possessed
- sensible
- serene
- sober
- sound
- together
- tranquil
- well-balanced
