Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Fiendish and difficult are semantically related. In some cases you can replace term "Fiendish" with "Difficult", this adjectives are similar.
Nearby Word: difficulty
Fiendish
Fiendish adjective - Of, relating to, or worthy of an evil spirit.
Difficult and fiendish are semantically related. Sometimes you can use "Difficult" instead an adjective "Fiendish".
Nearby Words: fiend, fiendishly
Both words in one sentence
- Lemmings was already a pretty difficult and fiendish game to begin with, but the expansion pack, Oh No, More Lemmings really takes it Up to Eleven.
Source: Nintendo Hard / Puzzle Games -
The sports cars on the desktop stages are difficult anyway, but the final iteration, "Win This Race To Be Champion" is particularly fiendish, particularly when you realise they're the only vehicle you have to do four races with.
Source: Difficulty Spike
Cite this Source
Fiendish and Difficult. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/difficult/fiendish
Difficult & Fiendish. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/difficult/fiendish>.
Fiendish or Difficult. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/difficult/fiendish.
Google Ngram Viewer shows how "difficult" and "fiendish" have occurred on timeline