Vocabulary
Common words first. Switch to Full dictionary for the complete list. Tap a word for details.
Full dictionary · 217,056 · 199081–199120
optimize; optimise
optoelectronics
obelisk
opaque
operation code; op-code
opera glasses
opéra comique
opera house
operand
operational
operations
operations research; OR
operation center; operation centre
operations research
operating
operating system; OS
opposition party
opportunist
opportunism
opossum
omitting; excluding; leaving out; rejecting (e.g. faulty products); throwing out
omurice; fried rice wrapped in or topped with omelette
omega (last letter of the Greek alphabet)
prayer; supplication
Netherlands; Holland
oriented
calories in ingredients of processed food
original scenario
original print
origin
Olympiad
Olympic Day (June 23)
orgasm
orgone energy
alternative
alternate
orthophenyl phenol; OPP
Oregon
orangeade
orange juice