The words to avoid are those words which are not useful for your SEO ranking. It is near impossible to list them all here. If however your problem is about listing the right keywords, it would have been a fairly easy problem to tackle because those ones are usually fewer.
Please note that no keywords are really bad as such. What is bad is if the words are not relevant to your type of business. Having said all that, I strongly advise you to avoid the word “blast” either in your keywords or even in text ads. Many Search Engines really “hate” that word. You will be doing yourself and your business a lot of good if you avoid using it to promote your business.
Best of luck in your SEO marketing!