optical – adjective tungkol sa mata
optician
optician – noun optiko manggagamot sa paningin
optimistic
optimistic – adjective maasahin hindi nasisiraan ng loob
opulent
opulent – adjective mayaman
or
or – conjunction o o kaya
oracle
oracle – noun manghuhula
oral
oral – adjective sinasalita pagbigkas
orally
orally – adverb pagbigkas
orange
orange – noun kahel dalandan dalanghita kulay kahel
orator
orator – noun orador mananalumpati