1Hobo and bum
There is a difference between a hobo and a bum. A hobo is a migratory worker, while a bum doesn't work at all.
2Aye aye sir and Yes sir
On ships at sea there is a difference between "aye aye sir" and "yes sir". "Aye aye, sir" indicates that an order has been received, is understood and will be carried out immediately. "Yes, sir" would only indicate agreement to an order.
3Knife and dagger
The difference between a knife and a dagger is that a dagger has a double-edged blade while other knives only have the one.
4Fast and slow metabolism
The difference between a "fast" metabolism or a "slow" one is about 200 calories a day (e.g. one pop tart).
5Blizzard and snowstorm
The difference between a blizzard and a snowstorm is the strength of the wind, not the amount of snow. To be a blizzard, a snow storm must have sustained winds or frequent gusts that are greater than or equal to 56 km/h (35 mph) with blowing or drifting snow which reduces visibility to 400 m or 0.25 mi or less and must last for a prolonged period of time—typically three hours or more.
6Fossil bone and regular rock
The difference between a fossilized bone and a regular rock can be found by licking them. Your tongue will stick to the fossil because the tiny pores that were in the bone will suck away moisture.
7Disc and disk
The difference between disc and disk. Disc refers to optical media (Blu-ray, CD, DVD, etc), and disk refers to magnetic media (floppy disk, hard disk, etc).
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8Sprocket and gear
The difference between a sprocket and a gear: a gear meshes with other gears, while a sprocket meshes with a chain, belt or other kinds of perforated material.
9Telenovelas and Soap opera
There is a difference between telenovelas and soap operas. Telenovelas end after a certain period of time, while soap operas go on as long as ratings justify doing so.
10Confederation and federation
The main difference between a confederation and a federation is that the membership of the first is voluntary and the second is involuntary
