Pinnacle rhymes with:
clinical, barnacle, canonical, clinical, monocle, aeronautical, agrochemical, allegorical, anarchical, anatomical, anthropological, arbuckle, article, barnacle, bespectacle, biblical, biochemical, canonical, cervical, chemical, chimerical, clavicle, clerical, clinical, coracle, cortical, cuticle, deontological, diacritical, domical, epochal, equivocal, ethical, etymological, farcical, follicle, geophysical, grammatical, hierarchical, hornbuckle, hypothetical, impractical, maniacal, maracle, medical, methodical, miracle, monocle, mythical, nautical, numerical, obstacle, oracle, oratorical, particle, photochemical, polemical, political, pontifical, practical, quizzical, radical, receptacle, reciprocal, satirical, scatological, seismological, skeptical, spectacle, tentacle, topical, typical, unequivocal
Pinnacle sounds like:
pangallo, pangle, pencil, pengelly, peninsula, penkala, pennzoil, pensacola, pensyl, pingel, pingley, pinkley, ponsolle