Formidable
Formidable adjective - Requiring considerable physical or mental effort.
Usage example: running a marathon is a formidable undertaking
Hard is a synonym for formidable in difficult topic. In some cases you can use "Hard" instead an adjective "Formidable", when it comes to topics like heavy, onerous, arduous.
Nearby Word: formidably
Hard
Hard adjective - Requiring considerable physical or mental effort.
Usage example: a hard exam to pass
Formidable is a synonym for hard in difficult topic. You can use "Formidable" instead an adjective "Hard", if it concerns topics such as heavy, arduous, exhausting.
Mutual synonyms
Both words in one sentence
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Being that Abo is also a baseball pitcher, he has to work extra hard to stand out, even to his own parents, despite frankly having not very formidable skills.
- Regardless, he's still a formidable foe in the right hands, being able to block plenty of attacks and counter them with his normally hard-to-use attacks.
Source: Game Breaker / Final Fantasy -
He's sweet, hard-working, and shown to not only be excellent at cooking and house-cleaning (to the point where he works as America's housekeeper for some time) but also formidable in battle.
Source: Silk Hiding Steel
Cite this Source
Hard and Formidable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formidable/hard
Formidable & Hard. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formidable/hard>.
Hard or Formidable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formidable/hard.
Google Ngram Viewer shows how "formidable" and "hard" have occurred on timeline