Sniffily rhymes with:
anencephaly, artfully, blissfully, carefully, cheerfully, delightfully, dreadfully, dutifully, faithfully, fitfully, forcefully, frightfully, gainfully, gleefully, gracefully, gratefully, harmfully, helpfully, hopefully, joyfully, lawfully, manfully, masterfully, meaningfully, mercifully, mindfully, painfully, peacefully, pitifully, playfully, purposefully, regretfully, respectfully, rightfully, ruefully, skillfully, successfully, tactfully, tastefully, tearfully, thankfully, thoughtfully, truthfully, unlawfully, unsuccessfully, usefully, wilfully, willfully, wishfully, wistfully, woefully, wonderfully, wrongfully
Sniffily sounds like:
sample, sampley, sanville, schnabel, schnebly, seasonable, semple, shamble, shambley, shameful, simple, simply, sinful, sinopoli, snabel, snapple, snavely, sniffle, snively, snowball, snowfall, snowmobile, snowplow, sunnyvale, symbol