Different is an adjective, means : مختلف
- Different languages are used in different places in the world.
Difference is a noun, means: اختلاف. and also a verb means: يميَّز distinguish.
- I hope you have brains enough to see the difference.
Differ is a verb, means: يختلف
- We differ from them in some respects.
Differentiate is a verb means: يميَّز، يتخالف
- English doesn't differentiate between the verbs "ser" and "estar".