Purnell rhymes with:
pernell, bernal, burnell, colonel, diurnal, durnell, durnil, eternal, external, fraternal, infernal, internal, journal, kernel, maternal, nocturnal, paternal, pernell, vernal
Purnell sounds like:
parmele, parmelee, parmley, parnell, parnella, parrinello, perennial, perennially, pernell, pernella, primal, primly, prunella