wiretapper vs phone tapper

wiretapper and phone tapper both are nouns.

Word	Noun	Adjective	Verb	Adverb
wiretapper	Yes	No	No	No
phone tapper	Yes	No	No	No

As nouns, wiretapper and phone tapper are synonyms defined as:

wiretapper and phone tapper: someone who wiretaps a telephone or telegraph wire

Other synonyms of wiretapper include tapper.

wiretapper (noun)	phone tapper (noun)
someone who wiretaps a telephone or telegraph wire	someone who wiretaps a telephone or telegraph wire