Petrology rhymes with:
astrology, astrology, neurology, serology, virology, anesthesiology, anthology, anthropology, apology, archaeology, archeology, astrogeology, astrology, bacteriology, biology, biotechnology, cardiology, chocolatology, chronology, cosmetology, criminology, cytology, dendrochronology, deontology, dermatology, doxology, ecology, egyptology, electrobiology, embryology, endocrinology, enterology, entomology, epidemiology, epistemology, ethnology, ethology, etiology, etymology, genealogy, geology, geomorphology, gerontology, graphology, gynecology, hematology, histology, hymnology, ideology, immunology, infotechnology, intertechnology, kinesiology, limnology, meteorology, methodology, microbiology, micropaleontology, mineralogy, morphology, mycology, mythology, neurology, numerology, oncology, ontology, ophthalmology, ornithology, otology, paleontology, pathology, penology, pharmacology, physiology, polytechnology, pomology, psychology, radiology, rheumatology, scientology, seismology, serology, sociology, technology, terminology, theology, toxicology, transtechnology, urology, virology, zoology
Petrology sounds like:
patrol's, patrols, petrels, petroleos, petroles