adjective
common, usual
Synonyms: accustomed, acknowledged, average, commonplace, conventional, customary, general, habitual, mean, median, methodical, natural, orderly, ordinary, popular, prevalent, regular, routine, run-of-the-mill, standard, traditional, typic, typical, unexceptional
Antonyms: abnormal, irregular, odd, strange, uncommon, unconventional, unusual
adjective
sane, rational
Synonyms: all there, compos mentis, cool, healthy, in good health, in one’s right mind, lucid, reasonable, right, right-minded, sound, together, well-adjusted, whole, wholesome
Antonyms: abnormal, eccentric, insane, irrational, irregular, odd, unbalanced