The word "yoo-hooed" can be defined as a type of call, or a shout, used to get someone's attention. However, there are many synonyms that can be used to convey the same meaning. One such synonym is "hollered," which also refers to a loud call or shout. Another synonym is "yelled," which conveys a similar sense of urgency and volume. "Screamed" is another synonym that suggests a call characterized by intensity and perhaps even desperation. Other synonyms for "yoo-hooed" include "shouted," "barked," "howled," and "whooped," each of which offers a slightly different nuance or emphasis.