interrogator vs enquirer

interrogator and enquirer both are nouns.

Word	Noun	Adjective	Verb	Adverb
interrogator	Yes	No	No	No
enquirer	Yes	No	No	No

As nouns, enquirer is a hypernym of interrogator; that is, enquirer is a word with a broader meaning than interrogator:

Other hypernyms of interrogator include asker, inquirer, querier, questioner.

interrogator (noun)	enquirer (noun)
a questioner who is excessively harsh	someone who asks a question