photo-offset vs offset printing

photo-offset and offset printing both are nouns.

Word	Noun	Adjective	Verb	Adverb
photo-offset	Yes	No	No	No
offset printing	Yes	No	No	No

As nouns, offset printing is a hypernym of photo-offset; that is, offset printing is a word with a broader meaning than photo-offset:

photo-offset: a method of offset printing using photomechanical plates
offset printing: a plate makes an inked impression on a rubber-blanketed cylinder, which in turn transfers it to the paper

Other hypernyms of photo-offset include offset.

photo-offset (noun)	offset printing (noun)
a method of offset printing using photomechanical plates	a plate makes an inked impression on a rubber-blanketed cylinder, which in turn transfers it to the paper