Every guitarist needs to know the anatomy of the guitar so they can properly reference the various parts. Be sure to study the video and image below to memorize everything.
Also, it's worth noting that some guitar parts have more than one associated name. For example, some people might call guitar tuners "Tuning Pegs", "Tuning Keys", "Machine Heads" or just simply "Tuners". So some guitar parts have a bit of flexibility as far as what they can be called.