As adjectives the difference between malevolent and fiendish
is that malevolent is having or displaying ill will; wishing harm on others while fiendish is sinister; evil; conniving; in the manner of a fiend.
malevolent
English
Adjective
(
en adjective)
having or displaying ill will; wishing harm on others
having an evil or harmful influence
Synonyms
* evil
* malicious
* See also
Antonyms
* benevolent
Related terms
* malevolence
* malevolently
fiendish
English
Adjective
(
en adjective)
Sinister; evil; conniving; in the manner of a fiend.
Derived terms
* fiendishly
* fiendishness
Anagrams
* finished