Enquiry
Part of speech: noun
Definition: A question.
Inquiry
Part of speech: noun
Definition: The act of inquiring; a seeking of information by asking questions; interrogation; a question or questioning.Search for truth, information, or knowledge; examination of facts or principles; research; investigation; as, physical inquiries.
Example sentence: Trial. A formal inquiry designed to prove and put upon record the blameless characters of judges, advocates and jurors.