Gerontology rhymes with:
micropaleontology, paleontology, scientology, deontology, micropaleontology, ontology, paleontology, scientology, chocolatology, cosmetology, cytology, deontology, dermatology, egyptology, hematology, histology, micropaleontology, ontology, otology, paleontology, rheumatology, scientology
Gerontology sounds like:
grendel's, grindlays, groundless, gruntal's