Synonyms of informality

1 Syllable
knack, snap, cinch
2 Syllables
fluency, dispatch, poise, breeze, smoothness, setup, aplomb, quickness
3 Syllables
unrestraint, casualness, easiness, readiness, unconstraint, expertness, pushover, cleverness, liberty, skillfulness
4 Syllables
simplicity, nonchalance, insouciance, supinity, composure, colloquialism, expertise, relaxedness, easygoingness, dexterity, efficiency, naturalness, effortlessness, spontaneity
5 Syllables
familiarity, flexibility, affability, familiarities, unaffectedness, unreservedness
6 Syllables
unceremoniousness
7 Syllables
overfamiliarity