Sonograms rhymes with:
diagrams, electrocardiograms, histograms, holograms, kilograms, logograms, milligrams, telegrams, diagrams, electrocardiograms, histograms, holograms, kilograms, logograms, mailgrams, mammograms, micrograms, milligrams, polygram's, program's, programs, programs', reprograms, telegrams
Sonograms sounds like:
snickering, sunscreens, synchronic, synchronize, synchronizes