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.
Couch
Feeblish
fakdihkh
Hexagon
The only word I could find that uses those letters and ends with H is hippish.
Utah
* heaven * hasten
whitefish, washcloth
Hostile
harness