planographic printing vs planography

planographic printing and planography both are nouns.

Word	Noun	Adjective	Verb	Adverb
planographic printing	Yes	No	No	No
planography	Yes	No	No	No

As nouns, planographic printing and planography are synonyms defined as:

planographic printing and planography: the process of printing from a surface on which the printing areas are not raised but are ink-receptive (as opposed to ink repellent)

planographic printing (noun)	planography (noun)
the process of printing from a surface on which the printing areas are not raised but are ink-receptive (as opposed to ink repellent)	the process of printing from a surface on which the printing areas are not raised but are ink-receptive (as opposed to ink repellent)