Is there a difference between kava and kava kava?

Could you elaborate on the distinction, if any, between kava and kava kava? As someone with a background in cryptocurrency and finance, I'm not entirely familiar with the specifics of botanicals or herbal remedies. However, in my professional practice, I've encountered the importance of clarity in terminology and understanding the nuances that may exist between similar sounding yet potentially distinct concepts. Is there a significant difference in the chemical composition, medicinal uses, or cultural significance of kava and kava kava? Your insights would be greatly appreciated.