Synonyms of informally

2 Syllables
freely, simply
3 Syllables
casually, readily, candidly, openly, commonly, artlessly, easily, normally, usually
4 Syllables
uniformly, reservedly, genuinely, familiarly, spontaneously, consistently, habitually, typically, naturally, innocently, generally
5 Syllables
customarily, ordinarily, intimately, impulsively, instinctively, unaffectedly, unpretentiously
6 Syllables
unemotionally, lackadaisically
7 Syllables
characteristically