A group of suitors is commonly called a Bevy. Other collective nouns you may see include Crowd and Throng.
A collective noun for suitors can be referred to as a "courtship" of suitors. Suitors are individuals who openly pursue a romantic relationship with someone, typically expressing love and admiration. However, when suitors flock together, forming a collective noun, they create a courtship—an assemblage of admirers vying for the attention and affection of a particular person. A courtship of suitors implies a group of passionate individuals endeavoring to win over the heart and favor of a beloved. Striving to stand out amongst the competition, these suitors may exhibit various characteristics such as charm, charisma, and wooing prowess in their endeavor. They playfully, symbolically or literally, court the object of their affection, employing artistic expression, intellectual conversations, or grand gestures of love and romance. The notion of a courtship captures the sea of hopeful suitors and the bustling energy surrounding the pursuit of love. Within a courtship, each suitor embodies the determination, anticipation, and vulnerability intrinsic to the act of courting, making the collective noun significant in expressing the joint excitement generated when suitors come together. Whether within novels, movies, historical settings, or even contemporary circumstances, a courtship of suitors provides a visual depiction of the vibrant, sometimes comical, and occasionally competitive nature of the pursuit of love.
Known collective nouns for Suitors include: