Word Unit: oriri-, orir-, ori-, or- (Latin: to rise, arising, to be born, source, original; the rising sun, east; to ascend, to spring up, to become visible, to appear)
Word Unit: -orium, -oria, -ory (Latin: a suffix; a place or instrument for performing the action of the main element; a place used for something)
Word Unit: orn- (Latin: to equip; to prepare, to furnish, to fit out)
Word Unit: ornitho-, ornith-, -ornithic, -ornithes, -ornithoid, -ornis, ornis- (Greek: bird, birds)
Word Unit: oro-, or-, ori- (Latin: mouth, face; referring to the "mouth")
Word Unit: oro-, oreo-, ore-, oreino-, orein- (Greek > Latin: mountain; hill)
Word Unit: oro-, orrho- (Greek: whey, serum)

Serum, whey words are also at this sero-, ser- unit.

Word Unit: -orrhexis, -rhexis, -rrhexis (Greek: used as a suffix; rupture of an organ or vessel; a breaking forth, bursting)
Word Unit: ortho-, orth- (Greek: right, straight, correct, true; designed to correct)
Word Unit: -ory (Latin: a suffix of adjectives ending in -ory; of or relating to; like; resembling)
Word Unit: orycto-, oryct- (Greek: fossil, mineral; dug, dig; literally "thing dug")
Word Unit: oryzo, oryz-, oryzi- (Greek > Latin: rice)
Word Unit: os-, oss-, ost-, oste- os [singular] or ossa [plural] (Latin: bone)
Word Unit: oscheo-, osche- + (Greek: scrotum; a combining form denoting relationship to the scrotum or the pouch of skin which contains the testes, epididymides, and lower portions of the spermatic cords)
Word Unit: oscillo-, oscill- (Latin: swing, vibrate, move, motion; from oscillum, a diminutive form of osoris, "mouth, face, small face")

Related "move, motion" word units: cine-; kine-; mobil-; mot-, mov-; seismo-; vibro-.

Word Unit: oscit- (Latin: yawning, the act of yawning; to gape [see the definitions for these words below])
Word Unit: oscula- (Latin: kiss; from "little mouth"; lip [diminutive of os-, "mouth"])
Word Unit: -ose (Latin: full of, abounding in, having the qualities of, characteristic of something)
Word Unit: -osis, -sis, -sia, -sy, -se (Greek > Latin: a suffix; actor, process, condition, or state of; result of; expresses a state or abnormal condition or process of some disease)
Word Unit: osmo-, osmia-, osmi-, osm-, -osmia, -osmatic (smell) + (Greek: odor; smell, smelling)

Inter-related cross references, directly or indirectly, involving word units meaning "smell, odor": arom-; brom-; odor-, odori-; olfacto-; osphresio-; ozon-.