Heartier rhymes with:
cartier, chartier, cartier, chartier, courtier, fortier, mortier, portier, sportier, altier, carpentier, cartier, chartier, cloutier, cottier, courtier, dirtier, emptier, flightier, fortier, gautier, heftier, loftier, meatier, meteor, mightier, mintier, mortier, nastier, palmatier, parmentier, peltier, portier, potier, prettier, rustier, saltier, sportier, tastier, thriftier, trottier, whittier
Heartier sounds like:
harder, hardier, hardware, harter, hartter, herder, hereditary, herter, horter, howerter, huerter