There are quite a lot of words where the sequence <ch> is pronounced k. Some of these are pretty obscure/technical. I have left some of these out of the lists below.
chameleon chaos chaotic character charisma chasm chemical chemist(ry) chimaera chlorine chloroform choir choral choreograph(er/y) chorus Christ christian Christmas chrome chromatic chromosome chronic chronicle chronometer chrysalis Chrysler
ache anarchy archaeolog(ical/ist/y) archaic archangel archival archive archivist bronchial bronchitis cochlea dachshund dichotomy echidna echo lichen mechanic(al) mechanism Michael mocha monochrome ochre orchestra pachyderm psyche strychnine technical technician technique technology Zachary
Bach diptych Enoch epoch loch monarch oligarch stomach triptych