Boggart

Boggart is one of numerous related terms used in English folklore for either a household spirit or a malevolent genius loci inhabiting fields, marshes or other topographical features. Other names of this group include bug, bugbear, bogey, bogeyman, bogle, etc., presumably all derived from (or related to) Old English pūcel, Irish púca and Welsh b...
Found on http://en.wikipedia.org/wiki/Boggart

boggart

spectre; bugbear; goblin
Found on http://phrontistery.info/b.html
No exact match found