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. while 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.
Part of speech: verb
Definition: To move lips in synchronization with sounds (generally recorded) so it appears they are the source of the sounds.
Part of speech: verb
Definition: 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-synch or Lip-sync in your sentence.