There are numerous synonyms for the phrase "adult human male". Some common ones are man, gentleman, male, guy, dude, chap, bloke, fellow, and dude. However, depending on the context, other words can be used, such as husband, father, brother, son, uncle, or grandpa. In more formal contexts, the term "gentleman" is often used, while in informal situations, "guy" or "dude" are more appropriate. In some cultures, there are specific terms for adult males, such as "baba" in some African countries, "otoko" in Japan, or "homme" in France. However, it's important to note that using the correct terminology is crucial in avoiding derogatory or offensive terms.