It could be debatable whether naped should be accepted as a word in its own right, since it seems to be always used in combinations. However it's accepted by Merriam-Webster, and Wiktionary, so who am I to dissent? I suppose the thing is that there are so many of those combinations: black naped hare, black naped oriole, yellow naped amazon, yellow naped woodpecker, rufous naped wren, etc, etc.
I'll add naped as a rare word.
