Conversion refers to the process of changing or converting the class of a word without changing its form. Conversion is also sometimes called functional shift because the change is in the function of the word, not necessarily the meaning.
Example :
Plane (noun) – an aircraft
To Plane (verb) – to smooth a wooden surface
1. Changing Noun into Adjective
2. Changing Noun into Verb
3. Changing Noun into Abstract Noun
4. Changing Adjective into Verb
5. Changing Adjective into Noun
6. Changing Verb into Noun