Receptaculum (recepto) is a place to receive or keep things, also a place of refuge: illud tibi oppidum receptaculum praedae fuit, Verr. 5, 59; insula incolis valida et receptaculum perfugarum, Tac. A. 14, 29. Tabernaculum (taberna), “tent,” has a meaning specialized from its noun stem: Caesar eo die tabernacula statui passus non est, B. C. 1, 81. Umbraculum (umbra) means both a shady place and the thing that furnishes shade: aurea pellebant tepidos umbracula soles, Ov. F. 2, 311; prope aream faciundum umbracula, quo succedant homines in aestu tempore meridiano, Varro, R. R. 1, 51, 2. 3. NOUNS DENOTING OBJECT OF ACTION.--There is also a small group of concrete _-culum_ words which are alike in that they denote the object of the action expressed by their verb stems. Deridiculum (derideo) is something to laugh at, an object of derision, (also ridicule itself): deridiculo fuit senex foedissimae adulationis tantum infamia usurus, Tac. A. 3, 57; quid tu me deridiculi gratia sic salutas? Am. 682. Ientaculum (iento) is something to eat, or breakfast: epulas interdum quadrifariam dispertiebat: in ientacula et prandia et cenas commissationesque, Suet. Vit. 13. Miraculum (miror) is something to wonder at, a miracle: audite portenta et miracula philosophorum somniantium, N. 1, 18; omnia transformat sese in miracula rerum, Ignemque horribilemque feram, Georg. 4, 441. Spectaculum is something to look at, a spectacle, show: quom hoc mihi optulisti tam lepidum spectaculum, Poen. 209. The verb stems of these four nouns, with the exception of the first, could conceivably form nouns meaning instrument, or result of action, or place; but only one of them, spectaculum, has any of these meanings, and that, of place: tantus est ex omnibus spectaculis usque a Capitolio plausus excitatus est, Sest. 124. B. ABSTRACT -CULUM WORDS, ALL DENOTING ACTION There are four abstract _-culum_ words, all expressing primarily action itself. Curriculum (curro) is a running: curre in Piraeum atque unum curriculum face, Trin. 1103. Periculum (stem seen in experire) is a trial, attempt, also danger, risk: fac semel periculum, Cist. 504; nescio quanto in periculo sumus, Phor. 58. Saeculum (sero), if this etymology is correct, is originally a sowing, then the thing sown, a generation, race, period of time: quid mirum si se temnunt mortalia saecula, Lucr. 5, 1238; et muliebre oritur patrio de semine saeculum, Lucr. 4, 1227; saeculum spatium annorum centum vocarunt, Varro, L. L. 6, 2. Oraculum (oro) is an utterance, usually of some god or prophet, sometimes the place where it is given: oracula ex eo ipso appellata sunt, quod inest in his deorum oratio, Top. 20, 77; exposui somnii et furoris oracula, quae carere arte dixeram, Div. 1, 32, 70; numquam illud oraculum Delphis tam celebre fuisset nisi...., Div. 1, 19, 37.