Consignificative is a complex word that refers to something that has significant meaning or makes an impact in a meaningful way. Alternatively, some synonyms for consignificative include meaningful, substantial, significant, momentous, weighty, and important. Significant emphasizes the importance of something while meaningful refers to the depth and value of the subject matter. Momentous implies an event or action that will have a significant impact on the future. Weighty suggests something that is heavy or has a significant influence and importance. Ultimately, these synonyms all emphasize the importance of something or someone in a powerful and impactful way.