Important
Important adjective - Having great meaning or lasting effect.
Usage example: the discovery of penicillin was a very important event in the history of medicine
Substantial is a synonym for important in significant topic. In some cases you can use "Substantial" instead an adjective "Important", when it comes to topics like serious, hefty. popular alternative
Substantial
Substantial adjective - Having great meaning or lasting effect.
Usage example: substantial changes to the school dress code that made a lot of people unhappy
Important is a synonym for substantial in significant topic. You can use "Important" instead an adjective "Substantial", if it concerns topics such as property, considerable, hefty. popular alternative
Mutual synonyms
Related pairs
- valuable and important
- valuable and substantial
- material and important
- material and substantial
- considerable and important
- considerable and substantial
- heavy and important
- heavy and substantial
- strong and important
- strong and substantial
- powerful and important
- powerful and substantial
- large and important
- large and substantial
Both words in one sentence
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The effects of this trade were substantial: Japan was introduced to European fabrics, glassware, clocks, tobacco, and most important for its time, firearms.
Source: Useful Notes / Sengoku Period - He's still important enough to throw substantial monkey wrenches into both Autobot and Decepticon plans as the Spanner in the Works and strong enough to defend himself sneakily.
Source: Analysis / Transformers Prime -
Though it offers substantial damage reduction, it comes with a LOT of drawbacks, such as reductions to mobility and the ever-important Dodge stat.
Source: Tabletop Game / Mordheim
Cite this Source
Substantial and Important. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/important/substantial
Important & Substantial. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/important/substantial>.
Substantial or Important. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/important/substantial.
Google Ngram Viewer shows how "important" and "substantial" have occurred on timeline