photomechanics vs photoplate making

photomechanics and photoplate making both are nouns.

Word	Noun	Adjective	Verb	Adverb
photomechanics	Yes	No	No	No
photoplate making	Yes	No	No	No

As nouns, photomechanics and photoplate making are synonyms defined as:

photomechanics and photoplate making: the process whereby printing surfaces (plates or cylinders) are produced by photographic methods

photomechanics (noun)	photoplate making (noun)
the technique of using photomechanical methods to make photographs into plates for printing	the process whereby printing surfaces (plates or cylinders) are produced by photographic methods
the process whereby printing surfaces (plates or cylinders) are produced by photographic methods