Part of speech:
The definition of wise is someone who uses good judgment, has common sense or is well informed.
Manifested in or involving practice:
The definition of prudent is someone who has good judgment and is careful and practical.
Careful about what one says or does; prudent; esp., keeping silent or preserving confidences when necessary
Having, applying, or showing sound judgment; wise and careful
The definition of rational is something that makes sense or that could be based in fact or someone who behaves and thinks logically.
Capable of reasoning; rational:
(Physiol.) Capable of responding to the proper stimulus; irritable
Excessive; immoderate; exorbitant
Showing sound judgment and rationality:
Compatible with an accepted point of view; orthodox:
Find another word for level-headed. In this page you can discover 15 synonyms, antonyms, idiomatic expressions, and related words for level-headed, like: wise, practical, prudent, discreet, judicious, rational, reasonable, excitable, upset, nervous and unreasonable.