Synonyms of altruistically

2 Syllables
nobly, warmly
3 Syllables
candidly, graciously, genially
4 Syllables
politely, liberally, charitably, ungrudgingly, bigheartedly, unselfishly, chivalrously
5 Syllables
majestically, benevolently, unreservedly, wholeheartedly, magnanimously
6 Syllables
enthusiastically