electronic computer vs data processor

electronic computer and data processor both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic computer	Yes	No	No	No
data processor	Yes	No	No	No

As nouns, electronic computer and data processor are synonyms defined as:

electronic computer and data processor: a machine for performing calculations automatically

Other synonyms of electronic computer include computer, computing device, computing machine, information processing system.

electronic computer (noun)	data processor (noun)
a machine for performing calculations automatically	a machine for performing calculations automatically