Ptarmigan and Partridge

Ptarmigan noun - Large Arctic and subarctic grouse with feathered feet and usually white winter plumage.

Partridge and ptarmigan are semantically related. In some cases you can use "Partridge" instead a noun "Ptarmigan".

Partridge noun - Heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds.

Ptarmigan and partridge are semantically related. You can use "Ptarmigan" instead a noun "Partridge".