For concealment or hiding:
* -ing: hiding (present participle)
* -er: hider (someone who hides)
* -able: hideable (capable of being hidden)
* -ment: hidement (act or process of hiding, rarely used)
For animal skin:
* -skin: hideskin (a synonym for hide)
* -leather: hideleather (a synonym for hide)
For other meanings of "hide" (like "hide" as a command):
* -out: hideout (a place to hide)
The best option will depend on the specific context and meaning you are trying to create.