Nadgwick rhymes with:
bailiwick, balliwick, barwick, bestwick, eastwick, elswick, fenwick, gatwick, hardwick, hartwick, herwick, keswick, linwick, marwick, morowick, pickwick, sandwick, shandwick, smithwick, traywick
Nadgwick sounds like:
nadja, nantes, nantz, natasha, natasha's, natchez, natchez', natchez's, natec's, natick, nato's, nats, natsios, natzke, nautica, ned's, neddick, needs, neidigh, neitz, neitzke, nematodes, nemetz, nemitz, nendick, nets, netz, newedge, newmont's, newt's, newts, niedzwiecki, nieto's, nietzsche, nimitz, nimtz, nineties, nineties', ninety's, ninths, nitka, nitsa, nitsch, nitsche, nitschke, nitz, nitza, nitza's, nitze, nitzsche, nodes, nods, nomad's, nomadic, nomads, nominates, nontoxic, nonwhites, notch, notches, note's, notes, notes', notice, notices, notis, nots, nottage, notz, nowadays, nudes, nudge, nudges, nut's, nuts