Respectfully rhymes with:
tactfully, artfully, delightfully, fitfully, frightfully, gratefully, regretfully, rightfully, tactfully, tastefully, thoughtfully, wistfully
Respectfully sounds like:
respectable, respectably, respectful, respectively
tactfully, artfully, delightfully, fitfully, frightfully, gratefully, regretfully, rightfully, tactfully, tastefully, thoughtfully, wistfully
respectable, respectably, respectful, respectively