Both, pith, lath, math, bath, hath, path, Goth, Roth, Seth, meth, Beth, myth, with
hush
zach
hoax
* Hang * Hung
Hazy or holy.
Some four letter words that start with R and end with H are:rashrichrushRuth
fish
Hurt
trim
Cash is a 4 letter word that starts with c and ends with h.
which
There are no words that exist in the English language that match those letters.