Here's my first puzzle attributed to the fortnightly topic, movies. I figured I'd try my hand at this series of pattern recognition puzzles.
Below is a chart listing words that fall into one or neither of two categories, Spiel Words™ and Spieg Words™ (though it should be noted that all Spieg Words™ are also Spiel Words™, they are just a more specific categorization). Mathematically speaking, the set of all Spieg Words is a subset of the set of all Spiel Words
Spieg Words™:
Cow
Law
Urn
Dear
Hear
Lamb
Lock
Made
Pear
Week
West
Apart
Liver
Ridge
Round
People
Spiel Words™:
Amp
Far
Red
Two
Atom
East
Find
Lace
Lose
Clock
Close
Range
South
Versa
Ground
Tenant
Picture
Neither
Oil
Buck
Dean
Dirt
Sear
Vice
Block
Crazy
Filth
Irate
North
Shark
Thief
Energy
Figure
Future
Zombie
Abridge
Electricity
Can you determine the rule I use to decide if I call it a Spiel Word™, a Spieg Word™, or neither? Feel free to ask below for certain words, but I ask that to avoid spamming up the question, if you have multiple, please ask them all at once.