Difference between Lip-sync and Lip-synch

What is the difference between Lip-sync and Lip-synch?

Lip-sync as a verb is to move lips in synchronization with sounds (generally recorded) so it appears they are the source of the sounds. while Lip-synch as a verb is to move lips in synchronization with sounds (generally recorded) so it appears they are the source of the sounds.

We hope you now know whether to use Lip-sync or Lip-synch in your sentence.