When you pretend you are singing by synchronizing your lip movements to a recording, you lip-synch—the vocal equivalent of playing “air guitar.” Some people mistakenly think the expression is “lip-sing,” and they often omit the required hyphen as well. Note that you can lip-synch to speech as well singing.
Many writers use the spelling “sync” rather than “synch.” Users of each form tend to regard the other as weird, but in contemporary writing “sync” clearly prevails.
This is the tenth year of the Common Errors in English Usage calendar. To celebrate, we are bringing back some of our favorite interesting, funny, but sometimes merely silly entries through the years before going on hiatus in 2016.
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