Formidable
Formidable adjective - Causing fear.
Significant and formidable are semantically related. In some cases you can use "Significant" instead an adjective "Formidable".
Nearby Word: formidably
Significant
Significant adjective - Clearly conveying a special meaning (as one's mood).
Formidable and significant are semantically related. Sometimes you can use "Formidable" instead an adjective "Significant".
Mutual synonyms
Both words in one sentence
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This orgy of chaos is even displayed in the campaign, where every 20 kills in the hub areas spawns a formidable enemy or something dangerous enough to both scare off the roaming enemies and give the player a significant challenge.
Source: Video Game / Anarchy Reigns -
Carriers can still mount some pretty formidable defenses, though, and their ability to repair and restore the shields of other ships can make them a fairly significant passive threat even without their fighters in play.
Source: The Battlestar
Cite this Source
Significant and Formidable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formidable/significant
Formidable & Significant. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formidable/significant>.
Significant or Formidable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formidable/significant.
Google Ngram Viewer shows how "formidable" and "significant" have occurred on timeline