disservice vs ill service

disservice and ill service both are nouns.

Word	Noun	Adjective	Verb	Adverb
disservice	Yes	No	No	No
ill service	Yes	No	No	No

As nouns, disservice and ill service are synonyms defined as:

disservice and ill service: an act intended to help that turns out badly

Other synonyms of disservice include ill turn.

disservice (noun)	ill service (noun)
an act intended to help that turns out badly	an act intended to help that turns out badly