Clark's rhymes with:
clarke's, clarks, clarke's, clarks, larks, arcs, arx, barkes, barks, clarke's, clarks, embarks, harks, larks, marcks, mark's, marks, marques, marx, park's, parkes, parks, parks', quarks, remarks, sharks, sparkes, sparks, stark's, starkes, starks, tjarks, vonarx
Clark's sounds like:
calarco, caller's, callers, caloric, calories, cellars, cellular's, chloris, choleric, claire's, clara's, clarice, claris, clarissa, clarisse, clark, clarke, clarke's, clarks, clarrisse, clears, clerc, clercq, clergy, cleric, clerics, clerissa, clerk, clerk's, clerks, clerks', clore's, clorox, clowers, colarusso, collars, collier's, colliers, collor's, colorize, colorocs, colors, coolers, culler's, cullers