Gravesite rhymes with:
andesite, anthracite, brucite, calcite, eyesight, felicite, foresight, granulocyte, hindsight, hussite, insight, leukocyte, lucite, lymphocyte, magnesite, oversight, parasite, phagocyte, plebiscite, procyte, starsight, website
Gravesite sounds like:
grapeshot, graveside, gravest, grooviest