1.  spare time(n = noun.time) free time - time available for hobbies and other activities that you enjoy;
is a kind of time off

2.  spare time(n = noun.act) free time - time that is free from duties or responsibilities;
is a kind of leisure, leisure time

N  leisure, convenience, spare time, spare hours, spare moments, vacant hour, time, time to spare, time on one's hands, holiday, relaxation, otium cum dignitate, ease, no hurry, no big rush, no deadline, leisure, leisurely, slow, deliberate, quiet, calm, undisturbed, at leisure, at one's ease, at loose ends, at a loose end, unhurriedly, deliberately, without undue haste, anytime, time hanging heavy on one's hands, eile mit Weile.

N  timeliness, occasion, opportunity, opening, room, event (eventuality), suitable season, proper season, suitable time, proper time, high time, opportuneness, tempestivity, crisis, turn, juncture, conjuncture, crisis, turning point, given time, nick of time, golden opportunity, well timed opportunity, fine opportunity, favorable opportunity, opening, clear stage, fair field, mollia tempora, fata Morgana, spare time, opportune, timely, well-timed, timeful, seasonable, providential, lucky, fortunate, happy, favorable, propitious, auspicious, critical, suitable, obiter dicta, opportunely, in proper course, in due course, in proper season, in due season, in proper time, in due time, for the nonce, in the nick of time, in the fullness of time, all in good time, just in time, at the eleventh hour, now or never, by the way, by the by, en passant, a propos, pro re nata, pro hac vice, par parenthese, parenthetically, by way of parenthesis, incidentally, while speaking of, while on the subject, extempore, on the spur of the moment, on the spur of the occasion, on the spot, carpe diem occasionem cognosce, one's hour is come, the time is up, that reminds me, now that you mention it, come to think of it, bien perdu bien connu, e sempre l'ora, ex quovis ligno non fit Mercurius, nosce tempus, nunc aut nunquam.

access time, against time, ahead of its time, ahead of time, alaska standard time, all the time, arrival time, at a time, at one time, at the same time, atlantic standard time, atlantic time, behind time, benting time, bering standard time, bering time, big time, big time operator, biological time, breakfast time, breathing time, buy time, central standard time, central time, checkout time, civil time, clock time, closing time, clotting time, command processing overhead time, common time, compensatory time, coordinated universal time, cosmic time, daylight-saving time, daylight-savings time, departure time, do time, double time, duple time, earth-received time, eastern standard time, eastern time, elapsed time, ephemeris time, extended time scale, extra time, face time, fast time scale, father time, flex time, for the first time, for the time being, four-four time, free time, from time to time, full time, geologic time, geological time, good time, greenwich mean time, greenwich time, hadean time, half time, hard time, harvest time, have a good time, hawaii standard time, hawaii time, haying time, high time, in due time, in good time, in no time, in real time, in the nick of time, in time, just in time, kill time, lead time, leisure time, light time, local time, long time, lunar time period, mark time, mean solar time, mean time, morning time, mountain standard time, mountain time, musical time, musical time signature, of all time, on time, one at a time, one time, one-way light time, pacific standard time, pacific time, part time, period of time, point in time, prime time, processing time, quadruple time, question time, quick time, ravages of time, reaction time, real time, regulation time, relaxation time, residence time, response time, round-trip light time, running time, seek time, serve time, show time, sidereal time, since a long time ago, slow time, slow time scale, small time, space time, spacecraft clock time, spacecraft event time, spare, spare part, spare tire, standard time, starting time, take time, take time by the forelock, take time off, terrestrial dynamical time, terrestrial time, time, time and a half, time and again, time and motion study, time and time again, time being, time bill, time bomb, time capsule, time clock, time constant, time deposit, time deposit account, time draft, time exposure, time frame, time immemorial, time interval, time lag, time limit, time loan, time machine, time note, time of arrival, time of day, time of departure, time of life, time of origin, time of year, time off, time out, time out of mind, time period, time plan, time policy, time saving, time scale, time series, time sharing, time sheet, time signal, time signature, time slot, time study, time to come, time unit, time value, time zone, to spare, track-to-track seek time, transmission time, travel time, triple time, turnaround time, two time, unit of time, universal time, waste of time, waste one's time, waste time, when the time comes, while away the time, work time, yukon time