Term: eastern woodrat: large greyish-brown wood rat of the southeastern United States
Broader: wood rat: any of various small short-tailed rodents of the northern hemisphere having soft fur grey above and white below with furred tails and large ears; some are hosts for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks) | Unrelated: hydrazo group: the bivalent group -HNNH- derived from hydrazine