through
Erich
The insect name that has nine letters and ends in an H, is cockroach. There are at least 4,500 species of cockroaches.
fakdihkh
Feeblish
Couch
Hexagon
The only word I could find that uses those letters and ends with H is hippish.
Hostile
harness
Utah
whitefish, washcloth
* heaven * hasten