Looking for another word for significant that better suits your sentence? Whether you're writing essays, reports, or marketing copy, this guide offers clear and effective synonyms for “significant”—with definitions, examples, and SEO-friendly alternatives.

What Does “Significant” Mean?

Significant (adjective) — important, meaningful, or having a noticeable effect. It can describe data, events, achievements, or emotional moments. Synonyms vary by context, including formal, academic, emotional, or numerical significance.

Common Synonyms for “Significant”

Synonym	Quick Meaning	Example Sentence
Important	having great value or influence	This is an important decision.
Notable	worthy of notice or attention	She made a notable contribution.
Major	large or impactful	They announced a major breakthrough.
Substantial	large in amount or meaning	We saw a substantial increase in sales.
Meaningful	deeply relevant or purposeful	It was a meaningful experience.

Formal or Academic Alternatives

Synonym	Nuance	Example Sentence
Considerable	notably large in extent	They made considerable progress.
Noteworthy	deserving attention	His research is particularly noteworthy.
Consequential	having long-term effects	This was a consequential ruling.
Material	legally or logically relevant	There were no material differences found.
Weighty	serious and important	It was a weighty decision to make.

Emotional & Personal Synonyms

Synonym	Nuance	Example Sentence
Memorable	worth remembering	It was a memorable day for all of us.
Impactful	leaving a strong effect	Her words were truly impactful.
Touching	emotionally meaningful	His speech was touching and sincere.
Powerful	emotionally strong or persuasive	That moment was powerful.
Valuable	of great personal or practical worth	Your insights were valuable to the team.

Synonyms for Statistical or Measurable Use

Synonym	Nuance	Example Sentence
Statistically relevant	shows measurable importance	The difference is statistically relevant.
Marked	clearly noticeable	A marked improvement was observed.
Pronounced	strongly evident	There was a pronounced difference in results.
Detectable	measurable or observable	The change was easily detectable.
Observable	able to be seen or measured	We found an observable shift in behavior.

Choosing the Right Synonym

1. Consider context: Use impactful for emotional writing, statistically relevant for data, and noteworthy for academic writing.
2. Match tone: Important and major are general-use, while substantial and consequential suit formal writing.
3. Clarify meaning: Does “significant” mean emotionally meaningful, numerically measurable, or influential in effect?

Quick Practice: Fill-in-the-Blank

1. The results show a ____ improvement in performance.
2. Her work had a ____ influence on the project’s success.
3. That was a truly ____ moment in his life.

Suggested answers: “marked,” “impactful,” and “memorable.”