The Online Lingua Franca-English-Lingua Franca Dictionary offers a useful, searchable vocabulary of one the latest candidates for a universal language.

Based on the Lingua Franca Nova language

Select a letter or type a word and click Find. Searches are automatically wild-carded

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English	Lingua Franca
oak	cuerca
oar	remo
oats	avena
obey	ober
object	ojeto; oposar-
oblige	obligar
oboe	obo
observe	oservar
obstinate	ostina
obstruct	impedir
obtain	otenir
obvious	evidente
occasion	ves
occasion, time	ves
occasionally	a poca veses
occupy	ocupar
occur	ocurer
ocean	mar
October	otobre
octopus	polpo
odor	odore
of	de
of age	anes, anes de viva
of course	natural
of, about, concerning	de
off	da
off (electicity)	descomutada
offend	ofender
offensive	ofendente
offer	ofre, ofrer
office	ofisia, buro
official	ofisial, ofisior
offline	dalinia
often	a multe veses
oil	olio
okay	si, oce
old	vea
olive	oliva
omelet	omeleta
omit	ometer
on	supra; comutada
on purpose	volente
on purpose, intentionally, willingly	volente
on the left	a sinistra
on the right	a destra
on time	a tempo
on time, in time	a tempo
on top of	supra
once	un ves
one	un. person
one way	dirije unica
one, ones	un, unes
ones	unes
onion	onion
online	enlinia
only	sola
only, sole	sola
onto	a supra
open	abrir
open	abrida
operate	operar
operating system	sistem operante
operation	opera
opine	opinar
opinion	opina
oppose	oposar
opposite	contra, oposante, a contra
opposite, against, in spite of	contra
opposite, facing	a contra
oppress	opresar
oppression	opresa
optician	oiolojiste
or	o
orange	orania
orchestra	orcestra
order	comanda, ordina, comandar, ordinar
orderly	ordinada
ordinary	comun
organ	organo
organize	organizar
origin	orijin
original	orijinal
other	otra
otherwise	a otra ves
our	nos
out	estra
out of	da
outer	esterna
output	esfluer
outside	estra, a estra
oven	forno
over	supra
overcoat	veston
overshadow	ombrir
owe	deber
owl	bu
own	aver, propre
owner	proprior
oxygen	osijen
oyster	ostra