HOBGOBLIN
bugbear, hobgoblin
(noun) an object of dread or apprehension; “Germany was always a bugbear for France”; “A foolish consistency is the hobgoblin of little minds”--Ralph Waldo Emerson
goblin, hob, hobgoblin
(noun) (folklore) a small grotesque supernatural creature that makes trouble for human beings
Source: WordNet® 3.1
Etymology
Noun
hobgoblin (plural hobgoblins)
A small, ugly goblin that makes trouble for humans. [from 1520s]
(by extension) A source of dread, fear or apprehension; a bugbear.
Synonyms
• (hostile supernatural creature): See goblin
Source: Wiktionary
Hob"gob`lin, n. Etym: [See 2d Hob, and Goblin.]
Definition: A frightful goblin; an imp; a bugaboo; also, a name formerly
given to the household spirit, Robin Goodfellow. Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition