Diaphragm rhymes with:
wolfram, anagram, barthram, bartram, beltram, buttram, cablegram, centigram, centram, coram, diagram, electrocardiogram, engram, epigram, histogram, hologram, kilogram, logogram, mailgram, mammogram, microgram, milgram, milligram, monogram, pegram, polygram, program, programme, reprogram, sonogram, telegram, tungsram, wolfgram, wolfram
Diaphragm sounds like:
debrecen, depression, diversion, dufresne