A crashing bore is someone or something that is extremely dull or tedious. The antonyms to this word could be interesting, engaging, captivating, fascinating, dynamic, entertaining, thrilling, alluring, spellbinding, stimulating, and enthralling. These words describe a person or activity that can hold one's attention and keep them engaged for a long time. Interesting implies that something has the power to arouse curiosity or interest. Captivating means something that attracts and holds one's attention. Fascinating describes something that is intriguing and absorbing. Dynamic refers to something which is energetic and full of activity. Thrilling and alluring express a sense of excitement and attractiveness that evokes strong emotions. Hence, these antonyms can help one to find interesting alternatives to the dullness of a crashing bore.