Noun : a wall of prejudice. ,a wall of fire; a wall of troops. ,the wall of a blood cell.    From Dictionary.com. 

Adjective : wall space. ,wall plants; wall cress. ,wall oven; a wall safe.    From Dictionary.com. 

Verb (used with object) : to wall the yard; to wall in the play area; He is walled in by lack of opportunity. ,to wall an unused entrance. ,The workmen had walled up the cat quite by mistake.    From Dictionary.com.