一、合成词
download
onlooker
online
outdoor(s)
outlet
output/input
outstanding
outlook
outline
outside/inside
overall
overcoat
overtime
overnight
oversea(s)
overcome
overhead
overtake
overthrow
update
upright
upset
upstairs
upside-down
up-to-date
upwards
understanding
undergo
undergroundundergraduate
underline
undertake
ballpen
blackboard
bathroom
basketball
chairman
daytime
earthquake
eyesight
fireplace
fisherman
football
footprint
framework
gunpowder
haircut
handbook
handball
handout
handwriting
headache
headquarter
headmaster
highway
keyboard
landlord
mainlandmasterpiece
meantime
nearby
network
offspring
otherwise
overall
passport
platform
pencilbox
postcard
postman
railway/road
salesman
seaman
sightseeing
snowstorm
spacecraft/ship
sportsman
tradesman
viewpoint
warehouse
waterfall
waterproof
widespread
worldwide
well-known
剪截