onerarius
ADJ
of burden; [navis oneraria => transport/cargo ship]

onero
V
load| burden; oppress

onerosus
ADJ
oppressive; burdensome; onerous

onocentaurus
N M
ass-centaur; (fabulous creature); impure person; monster (Douay)

onocrotalus
N M
pelican

onophorium
a costrel| a wooden bottle.

ontologia
N F
ontology| study of being; metaphysics related to being/essence; (Scanlon)

onus
N
load| burden; cargo

Onus probandi
The burden of proof

onustus
ADJ
laden

onycha
N F
kind of mollusc

onyche
N F
kind of mollusc

onychinus
ADJ
onyx| made of onyx marble; resembling/colored like onyx marble

onyx
N M
yellow marble; onyx box