computer vs electronic computer

computer and electronic computer both are nouns.

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

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

computer and electronic computer: a machine for performing calculations automatically

computer (noun)	electronic computer (noun)
a machine for performing calculations automatically	a machine for performing calculations automatically
an expert at calculation (or at operating calculating machines)