interrogator vs querier

interrogator and querier both are nouns.

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

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

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

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