ogre vs fiend

ogre and fiend both are nouns.

Word	Noun	Adjective	Verb	Adverb
ogre	Yes	No	No	No
fiend	Yes	No	No	No

As nouns, ogre and fiend are synonyms defined as:

Other synonyms of ogre include demon, devil, monster.

ogre (noun)	fiend (noun)
(folklore) a giant who likes to eat human beings	a cruel wicked and inhuman person
a cruel wicked and inhuman person	a person motivated by irrational enthusiasm (as for a cause)
	an evil supernatural being