Magnitude rhymes with:
altitude, amplitude, aptitude, attitude, certitude, exactitude, gratitude, latitude, longitude, multitude, servitude, solitude, verisimilitude
Magnitude sounds like:
machined, magenta, maginot, magnant, magnate, magnet, magneti, magnetite, maisonet, management, mangement, mankind, masonite, massenet, mazzanti, mccamant, mcconathy, mcentee, mcginnity, mcginty, mcintee, mckeand, mcmath, mcnatt, mcnett, mcnitt, mcnutt, migent, mincemeat, miscount, monsanto, monzonite, musante, myoscint