Thought for the day.

What a difference an 's' makes...

laugh·ter /ˈlæftər, ˈlɑf-/ Pronunciation Key - Show Spelled Pronunciation[laf-ter, lahf-]

–noun

1.	the action or sound of laughing.

2.	an inner quality, mood, disposition, etc., suggestive of laughter; mirthfulness: a man of laughter and goodwill.

3.	an expression or appearance of merriment or amusement.

4.	Archaic. an object of laughter; subject or matter for amusement.

slaugh·ter /ˈslɔtər/ Pronunciation Key - Show Spelled Pronunciation[slaw-ter]
–noun

1.	the killing or butchering of cattle, sheep, etc., esp. for food.

2.	the brutal or violent killing of a person.

3.	the killing of great numbers of people or animals indiscriminately; carnage: the slaughter of war.

–verb (used with object)

4.	to kill or butcher (animals), esp. for food.

5.	to kill in a brutal or violent manner.

6.	to slay in great numbers; massacre.

7.	Informal. to defeat thoroughly; trounce: They slaughtered our team.

In other words, you can't spell slaughter without "laughter"