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- 100%
- 101
- 11-deoxycorticosterone
- 110 proof
- 18-wheeler
- 2,4-D
- 2-dimensional
- 224
- 24/7/365
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- 3-D
- 3-D mammography
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- 3D
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- 4ever
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- 9/11
- 9/11 truther
- 90s
- :(
- :)
- @
- a
- A
- a capella
- a cappella
- A Coruña
- a damn sight
- a day after the fair
- a day late and a dollar short
- a fool and his money are soon parted
- a fortiori
- a friend in need is a friend indeed
- a go-go
- a helping hand
- a la mode
- a leopard can't change its spots
- a little
- a little bit
- a long time ago
- a lot
- a man may love his house, and yet not ride on the ridge
- a mensa et thoro
- a picture is worth a thousand words
- a picture paints a thousand words
- a posteriori
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- a rolling stone gathers no moss
- A to Z
- a treat
- a vinculo matrimonii
- a watched pot never boils
- a while
- a'
- a-
- a-hold