There are several synonyms for the word "moo-cow" that can be used to refer to a cow. One common synonym is simply "cow." Other synonyms include "bovine," "heifer," "dairy cow," and "beef cow." "Bos taurus" is also a scientific synonym for cow. Depending on the context, other words like "cattle," "livestock," "herd," and "steer" may also be used. Some regional terms for cow include "holy cow," "milch cow," and "maverick cow." Regardless of the chosen synonym, cow is one of the most recognizable and commonly used animals in human civilization.