Petrolear rhymes with:
chemclear, acyclovir, atmosphere, azmeer, belvidere, benazir, biosphere, chemclear, ellesmere, fryrear, headgear, hemisphere, kinnear, lanphear, lanphere, lechmere, lincolnshire, ljubomir, maiziere, mcateer, meyerbeer, midyear, minniear, mountaineer, mystere, nyerere, reindeer, retrovir, stratosphere, telesphere, vandermeer, vanderveer, vandeveer, whiteneir, windmere, yesteryear