Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Usage example: difficult questions on the exam that required analytical thinking
Formidable is a synonym for difficult in heavy topic. In some cases you can use "Formidable" instead an adjective "Difficult", when it comes to topics like ambitious, hard, complicated, arduous. popular alternative
Nearby Word: difficulty
Formidable
Formidable adjective - Requiring considerable physical or mental effort.
Usage example: running a marathon is a formidable undertaking
Difficult is a synonym for formidable in heavy topic. You can use "Difficult" instead an adjective "Formidable", if it concerns topics such as ambitious, troublesome, onerous, arduous. popular alternative
Nearby Word: formidably
Mutual synonyms
Related pairs
- strenuous and difficult
- strenuous and formidable
- stiff and difficult
- stiff and formidable
- demanding and difficult
- demanding and formidable
- rough and difficult
- rough and formidable
- heavy and difficult
- heavy and formidable
- hard and difficult
- hard and formidable
- severe and difficult
- severe and formidable
Both words in one sentence
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Generals too, are more easily dispatched in battle then by assassination or duels, since being surrounded by an entire army makes a Rake's mission difficult and being practiced blades make Generals formidable duelists.
Source: Video Game / Empire: Total War -
Humongous Mecha: The Voth have some rather formidable mechs that they employ in ground combat which can be rather difficult to defeat without a concerted effort from a team of players and supporting bridge officers.
Source: Video Game / Star Trek Online -
Speaking of office gags, starting in 1-4:Phoenix: Difficult-looking legal books stand in a formidable row.
Source: Franchise / Ace Attorney
Cite this Source
Formidable and Difficult. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/difficult/formidable
Difficult & Formidable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/difficult/formidable>.
Formidable or Difficult. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/difficult/formidable.
Google Ngram Viewer shows how "difficult" and "formidable" have occurred on timeline