noun
A query
inquiry, inquiring, interrogatory, interrogative, interrogation, inquisition, feeler, catechism, inquest, rhetorical question, burning question, crucial question, leading question, catch question, academic question, vexed question, sixty-four dollar question*.
Antonyms answer*, solution, reply.
A puzzle
enigma, mystery, problem; see puzzle 2.
A subject
proposal, topic, issue; see issue 1, subject 1.
beside the question
beyond question
in question
being considered, under discussion, under consideration, under advisement, at issue, controversial, in dispute, up for discussion, on the floor, on the agenda; see also controversial, questionable 1, uncertain 2.
out of the question