numen (en)

(noun) a spiritual force or influence often identified with a natural object, phenomenon, or place

numinous (en)

(adjective) supernatural mysterious / (adjective) filled with a sense of the presence of divinity; holy / (adjective) appealing to the higher emotions or to the aesthetic sense; spiritual

numismatics (en)

(noun plural but singular in construction) the study or collection of coins, tokens, and paper money and sometimes related objects (as medals)

obdurate (en)

(adjective) stubbornly persistent in wrongdoing / (adjective) hardened in feelings / (adjective) resistant to persuasion or softening influences

oblatory (en)

The act of offering something, such as worship or thanks, to a deity. 2. Oblation. a. The act of offering the bread and wine of the Eucharist.

obloquy (en)

(noun) a strongly condemnatory utterance; abusive language / (noun) the condition of one that is discredited; bad repute

obscurantist (en)

deliberately preventing the facts or full details of something from becoming known

obsequies (en)

funeral rites

obstreperous (en)

(adjective) marked by unruly or aggressive noisiness; clamorous / (adjective) stubbornly resistant to control; unruly

obtruding (en)

(verb) to thrust out; extrude / (verb) to force or impose (as oneself or one's ideas) without warrant or request / (verb) to become unduly prominent or interfering; intrude

obverse (en)

the opposite or counterpart of a fact or truth; the side of a coin or medal bearing the head or principal design

obviate (en)

(verb) to anticipate and prevent (as a situation) or make unnecessary (as an action)

occidental (en)

(adj) relating to the west

occiput (en)

(noun) the back part of the head or skull

occlusive (en)

(adj) occluding or tending to occlude (stop, close up, obstruct, etc)

odalisque (en)

(noun) a female slave / (noun) a concubine in a harem

Oder-Neisse line (en)

the international border between Germany and Poland; drawn at the Potsdam Conference in the aftermath of WWII

officious (en)

(adjective) kind obliging / (adjective) dutiful / (adjective) volunteering one's services where they are neither asked nor needed; meddlesome / (adjective) informal unofficial

oikos (grk)

household

oneiric (en)

(adjective) of or relating to dreams; dreamy

onomastic (en)

(adjective) of, relating to, or consisting of a name or names

ontic (en)

(adj) relating to entities and the facts about them; relating to real as opposed to phenomenal existence (philosophy)

ontogenetic (en)

(adjective) of, relating to, or appearing in the course of ontogeny (the origination and development of an organism) / (adjective) based on visible morphological characters

ontology (en)

(noun) a branch of metaphysics concerned with the nature and relations of being / (noun) a particular theory about the nature of being or the kinds of things that have existence

operaismo (it)

workerism: a political theory that emphasizes the importance of, or glorifies, the working class