_This puzzle is based off the [What is a Word™](https://puzzling.stackexchange.com/search?tab=relevance&q=what%20is%20a%20word%E2%84%A2) series started by [JLee](https://puzzling.stackexchange.com/users/463/jlee)_

If a word satisfies a certain property it is called a **Spike Word™**. Here are some examples:

| Spike Words™ | Not Spike Words™ |
|-|-|
| MAGNUM | RAIN |
| LINK | DEVICE |
| VANITY | FALLEN |
| KING | APEX |
| DUBSTEP | ART |
| VICTOR | SIMPLE |
| SICK | FROZEN |
| MUNCHKIN | HOBBIT |
| CHRONICLE | ELECTRONIC |
| VIXEN | HUNTER |

```
Spike Words™,Not Spike Words™
MAGNUM,RAIN
LINK,DEVICE
VANITY,FALLEN
KING,APEX
DUBSTEP,ART
VICTOR,SIMPLE
SICK,FROZEN
MUNCHKIN,HOBBIT
CHRONICLE,ELECTRONIC
VIXEN,HUNTER
```

What is the rule to tell whether a word is a Spike Word™ or not? Why is it called a Spike Word™? (Note that each word can be tested on its own.)