When it comes to expressing the phrase "of great importance", there is an abundance of synonyms that can help us articulate our thoughts with precision. Some alternatives include "crucial", emphasizing the vital role something plays; "significant", signifying the profound impact or influence it holds; "pivotal", underlining the central or critical nature of an object or idea; "essential", emphasizing its necessity or indispensability; "paramount", implying that the matter in question is of the utmost importance; "vital", stressing the essential role it plays in achieving desired outcomes. These synonyms grant us a diverse lexicon to effectively convey the significance of any concept, issue, or entity.