Heavy
Heavy adjective - Having a matter of importance as its topic.
Usage example: got into a heavy discussion about death and the afterlife
Significant is a synonym for heavy. In some cases you can use "Significant" instead an adjective "Heavy".
Significant
Significant adjective - Having great meaning or lasting effect.
Usage example: made a significant change in the procedure for applying for citizenship
Heavy is a synonym for significant in important topic. Sometimes you can use "Heavy" instead the word "Significant" as an adjective or a noun, if it concerns topics such as telling.
Related pairs
Both words in one sentence
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This effect can also be used to accentuate any heavy or significant impact, such as a blow to the head.
Source: Koosh Bomb - It's also heavy with irony, as the man with the significant birth date is maimed in the Vietnam War and becomes an anti-war activist.
Source: Significant Birth Date - It also attracted significant criticism for its heavy use of fetch quests and its Disappointing Last Level.
Source: Enjoy the Story, Skip the Game
Cite this Source
Significant and Heavy. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/heavy/significant
Heavy & Significant. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/heavy/significant>.
Significant or Heavy. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/heavy/significant.
Google Ngram Viewer shows how "heavy" and "significant" have occurred on timeline