printer's devil vs learner

printer's devil and learner both are nouns.

Word	Noun	Adjective	Verb	Adverb
printer's devil	Yes	No	No	No
learner	Yes	No	No	No

As nouns, learner is a hypernym of printer's devil; that is, learner is a word with a broader meaning than printer's devil:

Other hypernyms of printer's devil include apprentice, prentice.

printer's devil (noun)	learner (noun)
an apprentice in a printing establishment	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
	works for an expert to learn a trade