| affability(ease, familiarity, casualness) |
| aplomb(ease, familiarity, casualness) |
| aptitude(turn, ability, capacity, talent, bent) |
| ataraxia(calm, ease, content, genuineness, unaffectedness) |
| authenticity |
| autogenesis |
| autoschediasm |
| bed of roses(expression, idiom, calm, ease, content) |
| bona fides(expression, artlessness, ingenuousness, naturalness) |
| breeze(ease, familiarity, casualness) |
| burn(noun, vigor, liveliness, vitality, get-up-and-go) |
| calm(ease, content, genuineness, unaffectedness) |
| calmness(calm, ease, content, genuineness, unaffectedness) |
| capability(ability, capacity, talent) |
| capacity(ability, talent) |
| carelessness(noun, thoughtlessness, recklessness, rashness, impulsiveness) |
| cinch(ease, familiarity, casualness) |
| cleverness(ease, familiarity, casualness) |
| comfort(calm, ease, content, genuineness, unaffectedness) |
| competence(turn, ability, capacity, talent, bent) |