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fiendish Synonyms

Another word for fiendish

Choosing another word for fiendish depends on context, so the 16 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Extremely cruel, wicked, or malicious; characteristic of a fiend or demon.

Usage Example

"The novel's antagonist devised a diabolical plot to ruin his rival's reputation."

Strongest
diabolical
demonic
devilish
Strong
wicked
cruel
heinous
monstrous
nefarious
vicious

• adjective (Context 2)

Extremely complex, clever, or difficult to solve or overcome.

Usage Example

"The Sunday newspaper featured a tortuous crossword puzzle that stumped everyone in the office."

Strong
tortuous
baffling
perplexing
intricate
formidable
ingenious
grueling

Opposites of fiendish

The opposite of fiendish shifts depending on context. Common opposites include:

angelic
simple
saintly
easy
benevolent
humane
compassionate
straightforward
See all opposites of fiendish

• Nearby Words

fieldwork
fieldworker
fiend
fiendish
fiendishly
fierce
fierce snake

Cite this Entry

Wordmom. (2026). Synonyms for Fiendish. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/fiendish
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