Altitude rhymes with:
multitude, aptitude, attitude, certitude, exactitude, gratitude, latitude, multitude, amplitude, aptitude, attitude, certitude, exactitude, gratitude, latitude, longitude, magnitude, multitude, servitude, solitude, verisimilitude
Altitude sounds like:
ahold, alda, alday, aldi, aldo, aleda, aledo, aleta, aletha, alethea, aletti, alida, alioto, alita, alithia, alito, all-out, allayed, allday, allied, allot, alloted, allotted, allowed, allude, alluded, alodie, alot, aloud, alt, alta, altai, altay, althea, alto, altoid, alwaleed, alwood, auld, auletta, ault, awalt