Deep
Deep adjective - Extending far downward.
Significant and deep are semantically related. In some cases you can use "Significant" instead an adjective "Deep".
Significant
Significant adjective - Clearly conveying a special meaning (as one's mood).
Deep and significant are semantically related. Sometimes you can use "Deep" instead an adjective "Significant".
Both words in one sentence
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While they do have major spaceports, if real trouble comes around, they can quickly duck into the planet's deep forest, where they have a significant advantage over their attackers.
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Though the narrative is mostly linear, Saleem acts like a literature student performing a deep reading of a work, and excitedly references future events whenever he notices something significant.
Source: Literature / Midnight's Children - In the Star Trek: Deep Space Nine Relaunch novels, the Andorians and Bajorans, at least, demonstrate significant cultural differences depending on which region of their planets they originate on.
Source: Multicultural Alien Planet
Cite this Source
Significant and Deep. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deep/significant
Deep & Significant. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deep/significant>.
Significant or Deep. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deep/significant.
Google Ngram Viewer shows how "deep" and "significant" have occurred on timeline