The word "unnotably" refers to something that is not worthy of attention, significance or notice. Its antonyms, therefore, would be words that denote high visibility, importance and attention. These antonyms include illustrious, famous, renowned, remarkable, notable, and notorious, among others. Illustrious describes something highly regarded or recognized for its excellence. Famous refers to widely recognized or well-known individuals, places or events. Renowned means highly esteemed, renowned or famous for being excellent. Remarkable implies something worthy of attention or notice, exceptional, or extraordinary. Notable means outstanding or highly significant, while notorious implies widespread negative reputation or infamy. Therefore, these antonyms serve to illustrate the opposite of "unnotably," as they describe things that are highly visible, significant, and attention-worthy.