Entirety rhymes with:
antipoverty, cafferty, cloherty, clougherty, daugherty, docherty, doherty, dougherty, faherty, finerty, finnerty, fluharty, fogerty, hagerty, haggerty, halferty, haverty, huberty, lafferty, lamberty, laverty, liberty, mcafferty, mccafferty, mcclafferty, mcclaugherty, mclafferty, o'doherty, o'dougherty, o'flaherty, odoherty, oflaherty, poverty, property, puberty, rafferty, swagerty, swaggerty
Entirety sounds like:
endeared, endured, entered, entreaty