Synonyms of sincerely

2 Syllables
staunchly, deeply, sternly, really, simply, loyally, frankly, truly
3 Syllables
earnestly, eagerly, candidly, truthfully, seriously, honestly, hungrily, thirstily, cravingly, gloriously, longingly, ardently, fervently, breathlessly, profoundly, happily, steadfastly, healthily, devoutly, smilingly, zestfully, vibrantly
4 Syllables
confirmedly, trustworthily, actively, genuinely, impatiently, aboveboard, spiritedly, vigorously, creditably, illustriously, naturally, ethically, ingenuously, conscientiously, guilelessly, exultantly, hilariously, expectantly
5 Syllables
determinedly, advantageously, magnanimously, intelligibly, matter-of-factly, wholeheartedly
6 Syllables
exhilaratingly
7 Syllables
anticipatorily