There are several synonyms for the term "male genitalias." Some of the more common ones include penis, phallus, member, organ, shaft, and rod. While each of these terms refers to the same anatomical structure, they may be used in different contexts or carry different connotations depending on the speaker and audience. Additionally, some slang words like cock, dick, and willy may be used informally among friends or in sexual situations but may be considered inappropriate or offensive in more formal or professional settings. Overall, the choice of synonym depends on the situation and the speaker's personal preferences and communication style.