When it comes to the word "ultrasonically," there are several synonyms that can be used to convey the same meaning. For instance, you can use "echographically" to refer to the use of high-frequency sound waves to produce images of body structures. Another synonym for "ultrasonically" is "sonically," which means relating to or produced by sound. "Acoustically" can also be used to describe the use of sound waves to measure and study physical properties of materials and objects. In summary, there are several words you can use instead of "ultrasonically" to achieve the same meaning, including "echographically," "sonically," and "acoustically".