oneself – pronoun sarili
onion
onion – noun sibuyas
onlooker
onlooker – noun manonood
only
only – adverb tangi lamang
onslaught
onslaught – noun paninibasib paglusob
onward
onward – adjective pagsulong
ooze
ooze – verb tumulo tumagas
opal
opal – noun opalo
opalescent
opalescent – adjective iba-ibang kulay
opaque
opaque – adjective hindi madaanan ng liwanag malabo