With giant strides is an idiomatic expression that means making a significant and rapid progress. There are several synonyms for this phrase, which include "in leaps and bounds," "by leaps and bounds," "in great strides," and "with great strides." All of these phrases convey the same meaning, which is significant progress made in a short amount of time. One can use these synonyms in place of with giant strides to add variety to their writing. These phrases are often used in both formal and informal contexts, especially when describing progress made in personal, professional, or academic growth.