Opposite of McDonalds is Burger King
Bee Wasp
Dog Cat
Bitter Lager
On - Off
High - Low
In - Out
Up - Down
Left - Right
Man - Woman 
Clever - Stupid
slow - fast
fat - thin
pen - pencil
life - death
pc - mac
you - me
autotrader - biketrader
windows - linux
internet explorer - mozilla
Antonym - Synonym
Vacuum - Plenum
penis - vagina:blush:
- :crying:
Youve got too much time on your hands… !!! :DOh theres one…
Hands…Feet
Sun…Moon
Run…Walk
Ocean …Desert
Rough…Smooth
Ying…Yang
Blimey…now im at it
Acute -Obtuse
Slack - Tight:w00t:
Honda - Harley
Star Wars - Star Trek
Bikes - Cars