monster vs ogre

monster and ogre both are nouns.

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

As nouns, monster and ogre are synonyms defined as:

Other synonyms of monster include demon, devil, fiend.

monster (noun)	ogre (noun)
(medicine) a grossly malformed and usually nonviable fetus	(folklore) a giant who likes to eat human beings
a cruel wicked and inhuman person	a cruel wicked and inhuman person
a person or animal that is markedly unusual or deformed
an imaginary creature usually having various human and animal parts
someone that is abnormally large and powerful