13 letter words
ARCHAEOPTERYX​30
11 letter words
CHALCEDONYX​29
10 letter words
NECTOCALYX​24
9 letter words
POMPHOLYX​28
8 letter words
SARDONYX​19
EPICALYX​22
7 letter words
APTERYX​19
BOSTRYX​19
6 letter words
COCCYX​22
BOMBYX​22
CARNYX​18
5 letter words
CALYX​17
4 letter words
ONYX​14
ORYX​14
3 letter words
PYX​15