The word-based description "💭💬🅱️🆙" can be related to the description "bubble bu" by interpreting it as follows: "💭💬🅱️🆙" represents the thought bubble emoji (💭) and the speech balloon emoji (💬), followed by the letter B (🅱️) and an arrow pointing upwards (🆙). This could be interpreted as someone having a thought or conversation about something related to the letter B, and that thought or conversation is progressing or moving forward.