N  topic, subject of thought, material for thought, food for the mind, mental pabulum, subject, subject matter, matter, theme, noemata, topic, what it is about, thesis, text, business, affair, matter in hand, argument, motion, resolution, head, chapter, case, point, proposition, theorem, field of inquiry, moot point, problem, thought of, uppermost in the mind, in petto, under consideration, in question, in the mind, on foot, on the carpet, on the docket, on the tapis, relative to.

N  inquiry, request, search, research, quest, pursuit, examination, review, scrutiny, investigation, indagation, perquisition, perscrutation, pervestigation, inquest, inquisition, exploration, exploitation, ventilation, sifting, calculation, analysis, dissection, resolution, induction, Baconian method, strict inquiry, close inquiry, searching inquiry, exhaustive inquiry, narrow search, strict search, study, scire facias, ad referendum, trial, questioning, interrogation, interrogatory, interpellation, challenge, examination, cross-examination, catechism, feeler, Socratic method, zetetic philosophy, leading question, discussion, reconnoitering, reconnaissance, prying, espionage, espionnage, domiciliary visit, peep behind the curtain, lantern of Diogenes, question, query, problem, desideratum, point to be solved, porism, subject of inquiry, field of inquiry, subject of controversy, point in dispute, matter in dispute, moot point, issue, question at issue, bone of contention, plain question, fair question, open question, enigma, knotty point, quodlibet, threshold of an inquiry, inquirer, investigator, inquisitor, inspector, querist, examiner, catechist, scrutator scrutineer scrutinizer, analyst, quidnunc, inquiry, inquisitive, requisitive, requisitory, catechetical, inquisitorial, analytic, in search of, in quest of, on the lookout for, interrogative, zetetic, all searching, undetermined, untried, undecided, in question, in dispute, in issue, in course of inquiry, under discussion, under consideration, under investigation, sub judice, moot, proposed, doubtful, quaere?, what?, why?, wherefore?, whence?, whither?, where?, how comes it?, how happens it?, how is it?, what is the reason?, what's the matter?, nicht wahr?, what's in the wind?, what on earth?, when?, who?.

alveolar point, auricular point, basic point defense missile system, beside the point, blue point, blue point siamese, boiling point, breaker point, breaking point, cardinal compass point, case in point, celestial point, compass point, craniometric point, critical point, curie point, data point, decimal point, dew point, diamond point, distributor point, dry point, end point, equinoctial point, exclamation point, extra point, extreme point, flash point, focal point, fourfold point correlation, freezing point, full point, geographic point, geographical point, grade point, grade point average, gros point, high point, in point of fact, interrogation point, intersection point, jugal point, jumping-off point, libration point, limit point, lubber's point, main point, make a point, make a point of, match point, mcburney's point, melting point, million floating point operations per second, moot, moot court, navel point, on that point, orbital point, pedal point, percentage point, petit point, point, point after, point after touchdown, point alphabet, point appliqu'82, point at, point blank, point duty, point in time, point jam, point lace, point man, point mutation, point of accumulation, point of apoapsis, point of departure, point of entry, point of honor, point of intersection, point of no return, point of order, point of periapsis, point of reference, point of view, point out, point source, point switch, point system, point the way, point to, point up, point woman, power point, pressure point, rallying point, reference point, saturation point, selling point, set point, starting point, sticking point, stopping point, strong point, suspension point, talking point, terminal point, to the point, topographic point, trillion floating point operations per second, trois point, turning point, vaccine point, vanishing point, vantage point, vowel point, weak point, well point, west point, zero point