When describing whether something meets a certain standard or requirement, the phrase "is sufficient" is commonly used. However, there are several different synonyms that can be used to convey the same meaning. One option is "meets the criteria," which implies that the item in question satisfies all necessary conditions. Another synonym is "is satisfactory," which indicates that it is sufficient but not necessarily exceptional. A third option is "is adequate," which suggests that it is sufficient for the task at hand. Other phrases that might be used in place of "is sufficient" include "is ample," "is enough," and "is substantial." Ultimately, the choice of which synonym to use will depend on the context in which it is being used.