Words starting with O

to obey, to do as you're told

of, belonging to

oh my god!, oh no! (literally 'dead already')

oily, greasy

old (people, animals)

old-fashioned, uncool, corny

olive green, army green

Thai omelette

on time, punctual

only, just

oops!, oh! (a little surprise)

to open

opposite, across from

…or not? (checking a yes/no question)

orange (the fruit and the colour)

to be ordained, to become a monk

to order (food, online)

ordinary, normal

to arrange, to organise, to put in order

other, else

otherwise, or else

ouch!, argh! (pain, exasperation)

to exceed

overtime (OT)