When it comes to describing someone who is speaking a lot, the term "particularly loquacious" is often used. But if you're looking for other synonyms to add more depth and nuance to your description, there are plenty of options to choose from. Some alternatives might include "verbose," "talkative," "chatty," "garrulous," "voluble," "wordy," "effusive," "prolix," or even "windy." Depending on the context and tone of your writing, each of these words can help add more color and specificity to your description, providing a fuller picture of the speaker in question.