The synonyms of “significant” are “meaningful”, “substantial”, and “notable”.
“Meaningful” emphasizes having a deep or important purpose or value. For example, “A meaningful conversation can have a lasting impact.” It suggests that there is significance in the content or intention.
“Substantial” implies being of considerable size, amount, or importance. “The company made a substantial investment in research and development.” It indicates that there is a solid and significant presence or contribution.
“Notable” means worthy of attention or remark. “Her achievements are notable in the field of science.” It shows that something stands out and is significant enough to be noticed.
In conclusion, these synonyms for “significant” each offer a different way to express importance, depth, or prominence.