Expect (Verb)

Level 1:
Expect - Expecto

You can see this one, easily. It's even fairly easy to catch when listening to spanish. This is, in fact, a stereotypical Level 1... Take the English word and add an "-o" to the end, just as you might expect.

Pronounced: "ex - PECT - oh"

Experiment (Verb)

Level 2:
Experiment - Experimentar

Instead of adding an "-o" here, you add an "-ar", which is a common ending for Spanish verbs.

Effect (Noun)

Level 2:
Effect - Efecto

In addition to having the "-o" appended to the end, the Spanish version features one "f" instead of two, having the effect of making the length of the word the same.

Electric (adjective)

Level 2:
Electric - Eléctrico

Electric is pretty much a classic example of a Level 2 word.

In English, it's "Electric" ...in Spanish, you add an "o" to the end...

"Eléctrico"

Thank you, Hollywood...