An interesting list of words.
i looked at them from a slightly different angle - 'If I were playing a Chi game and this word was classed as rare, would I be surprised and feel it should be common?'
I think there are only three on the list that fall into this category - ammeter which I remember from Physics lessons all those years ago, mambo -{why should it be classed differently to samba, salsa or rumba?) and tailpipe, familiar to anyone who owns, or has ever owned, a motor vehicle of any kind. Should it be hyphenated? Personally, I think not, but I'm often in disagreement with others about words which should or should not be written with a hyphen.
However. applesauce as one word??!! I'm still shaking my head in disbelief at that one