information processing vs informatics

information processing and informatics both are nouns.

Word	Noun	Adjective	Verb	Adverb
information processing	Yes	No	No	No
informatics	Yes	No	No	No

As nouns, information processing and informatics are synonyms defined as:

information processing and informatics: the sciences concerned with gathering, manipulating, storing, retrieving, and classifying recorded information

Other synonyms of information processing include information science, IP.

information processing (noun)	informatics (noun)
the sciences concerned with gathering, manipulating, storing, retrieving, and classifying recorded information	the sciences concerned with gathering, manipulating, storing, retrieving, and classifying recorded information