Full speeds can be described using a variety of different synonyms that all convey a sense of fast and forceful movement. Words like rapid, swift, speedy, and brisk all capture this sense of speed and momentum. Alternatively, terms like galloping or streaking can be used to describe the movement of animals or people moving quickly. In a technological context, words like high-speed, lightning-fast, and supersonic can be used to describe the movement of data or other digital information. Ultimately, the most effective synonym will depend on the specific context and the desired tone. However, any of these synonyms should help to convey a sense of energy, motion, and urgency when used in place of the term "full speeds".