boggard
Boggard (noun) means a ghost or goblin-like spirit, especially one said to haunt a dark or violent place.
Etymology
Uncertain; occurring since 16th century in northern and north midlands British dialects; etymologically related to boggle, bogle, and obsolete bog (“a bugbear”); the first element perhaps ultimately a variant of bug (“goblin; terrifying thing; etc.”), and thus equivalent to bog + -ard (“augmentative suffix”).