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-.

Word Unit: osmo-, osmia-, osmi-, -osmia, -osmatic (push) + (Greek: impulse, thrust, push, impel)

Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": pel-; puls-; trud-.

Word Unit: osphresio-, osphresi- + (Greek: to smell; pertaining to odor or to the sense of smell)

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

Word Unit: osphy-, osphyo- + (Greek: loin)
Word Unit: osseo-, osse-, ossi- (Latin: bone, bony)
Word Unit: osteo-, oste-, ost- (Greek: bone)
Word Unit: ostreo-, ostra-, ostre-, ostrei-, ostri-; ostraco-, ostrac-, -ostraca, -ostracan (Greek: oyster; creatures having or characterized by a type of hard shell)
Word Unit: ostro- + (Latin: east)
Word Unit: oti-, otio- (Latin: leisure, at leisure; at ease; idle)
Word Unit: -otic + (Greek: a suffix that means: state or condition of; diseased condition of)
Word Unit: oto-, ot-, -otic + (Greek: ear; relationship to the ear)

Related "ear" word families: auri-; myring-; tympano- (drum, stretched membrane).