abbreviator vs abridger

abbreviator and abridger both are nouns.

Word	Noun	Adjective	Verb	Adverb
abbreviator	Yes	No	No	No
abridger	Yes	No	No	No

As nouns, abbreviator and abridger are synonyms defined as:

abbreviator and abridger: one who shortens or abridges or condenses a written work

abbreviator (noun)	abridger (noun)
one who shortens or abridges or condenses a written work	one who shortens or abridges or condenses a written work