The word "yoo hooed" is a rarely used term that means to call out or shout to get someone's attention. There are several synonyms that can be used in place of "yoo hooed" to convey the same meaning. Some common synonyms include yelled, shouted, hollered, screamed, bellowed, and called out. Each of these words suggests a loud, forceful method of getting someone's attention. Other variations, including whistled, waved, or gestured, indicate a different approach, one that relies on visual or auditory cues instead of vocalization. Ultimately, the choice of synonym depends on the specific context and desired tone.