oro (1) noun “mount, mountain” (PE17:64), cf. Qenya oronoun "hill" (LT1:256; rather amboin LotR-style Quenya, though #oro "mountain, hill" appears in Orocarni and orofarnë, q.v. [PE17:83], also with the meaning “high” in oromar, q.v.) Cf. oro- element “up, aloft” (PE17:64).
oro- (2) vb. "rise" (LT1:256; Tolkien's later Quenya has orta-, but cf. oro #1)
Orocarninoun "the Red Mountains", place-name: literally rather *"Mountain-Reds": a plural form of carnë "red" with the element oro- "mountain" or "high" prefixed (Silm)
orofarnënoun occurring in LotR2:III ch. 4, variously translated "mountain-dwelling" (Letters:224) and “mountain ash” (PE17:83)
oromandinnoun "wood-spirits" (MC:215; this is "Qenya")
oromar (oromard-) noun "high (lofty) dwelling, ‘hall’“ (PM17:63-64), pl oromardi “high halls” or “high mansions” in Namárië (cf. RGEO:66, PE17:64), referring to the mansions of Manwë and Varda upon Mt. Taniquetil. See mar #1. Distinguish oromardinoun “mountain-dwellers” (PE16:96), pl. of *oromar(d-).
Oromënoun name of a Vala, adopted and adapted from Valarin. Observes Pengolodh, "the Eldar now take the name to singify 'horn-blowing' or 'horn-blower', but to the Valar it had no such meaning" (WJ:400-401, cf. SA:rom and ROM, TÁWAR in Etym, VT14:5). Genitive Oromëoand possessive Oroméva in WJ:368. .Loose compound Oromë róma “an Oromë horn”, sc. “one of Orome's horns (if he had more than one)” (WJ:368). A deleted entry in the Etymologies cited the name as Orómëwith a long middle vowel (VT45:15). Oromendil, masc. name *"Friend of Oromë" (UT:210)