Double Consonants
HM
hmuv(spear)
http://www.phy.mtu.edu/~mllarsen/spear.jpeg
CH
DH
DL
HL
HM
HN
KH
ML
NC
NK
NP
NQ
NR
NT
NY
PH
PL
QH
RH
TH
TS
TX
XY