What's the object?
Idioms
US vs UK
Idioms
UK vs US
100

Pages, chapters, index

book

100

The early bird catches the (blank)

worm (explanation: One who arrives first has the best chance for success)

100

what do Americans say instead of this UK English word: flat

apartment

100

It’s raining cats and (blank)

dogs (explanation: raining very hard)

100

what do UK English speakers say instead of this US English word: store

shop

200

Saddle, pedal, wheel

bicycle

200

The exam was easy, it was a piece of (blank)

cake

200

what do Americans say instead of this UK English word: lift

elevator

200

When one (blank) shuts, another one opens

door (explanation:  if one thing you do fails, you will soon have an opportunity to try to succeed at something else)

200

what do UK English speakers say instead of this US English word: pants

trousers

300

Hands, strap, face

watch
300

He’s the black (blank) of the family

sheep (explanation: The oddball member of the family who does not fall in line with the others; the worst member of the family)

300

what do Americans say instead of this UK English word: biscuit

cookie

300

Nobody wants to talk about the (blank) in the room

elephant (explanation: an important or enormous topic, question, or controversial issue that is obvious or that everyone knows about but no one mentions or wants to discuss)

300

what do UK English speakers say instead of this US English word: french fries

chips

400

Tongue, sole, laces

shoe

400

Sometimes I feel like a (blank) out of water

fish (explanation: if you're surrounded by people who are different to you, and it's making you feel a little uncomfortable)

400

what do Americans say instead of this UK English word: trainers

sneakers

400

I only see my family once in a blue (blank)

moon (explanation: not very often)

400

what do UK English speakers say instead of this US English word: gasoline 

petrol

500

Button, collar, cuff

shirt

500

This money is burning a hole in my (blank)

pockets (explanation: Money that someone has just acquired and is eager to spend)

500

what do Americans say instead of this UK English word: ground floor

first floor

500

Even a broken (blank) is right twice a day

clock (explanation: occasionally, even a person who's considered unreliable can be right about something or provide a solid point during a discussion)

500

what do UK English speakers say instead of this US English word: truck

lorry