Misdiagnosis rhymes with:
diagnosis, prognosis, diagnosis, hypnosis, prognosis, acidosis, apotheosis, arteriosclerosis, asbestosis, cirrhosis, diagnosis, fibrosis, heterosis, hypnosis, meiosis, necrosis, nephrosis, neurosis, prognosis, psychosis, sclerosis, symbiosis, thrombosis
Misdiagnosis sounds like:
misdiagnose, misdiagnoses, misjudging, mistaking