There are a score of words that start with “b” and end in “st” or “ster”, which are very confusing. I hope listing them out here will reduce the confusion, but I know I am probably hoping too much. Still we try, despite knowing the futility of it.
blust: This is not a word. It is probably a word in German, according to the omniscient google search, but it is not a word in English.
bluster: talk in a loud, aggressive, or indignant way with little effect. It can be either noun or verb. I often read about this word on google news.
blast: a destructive wave of highly compressed air spreading outward from an explosion.
blaster: a person or thing that emits or uses blasts. This word is more often used in fitness exercise, which means a type of physical exercise intended to strengthen specific muscle groups. My ear can’t distinguish between “blaster” and “bluster”. They just sound the same to me despite all the efforts to convince me otherwise.
blist: this is not a word.
blister: a small bubble on the skin filled with serum and caused by friction, burning, or other damage.
bust: a sculpture of a person’s head, shoulders, and chest; a woman’s chest as measured around her breasts.
buster: used as a mildly disrespectful or humorous form of address, especially to a man or boy.
blockbuster: a thing of great power or size, in particular a movie, book, or other product that is a great commercial success.
busted: (slang) Caught in the act of doing something one shouldn’t do. This word is often used in sitcom or movies, more often than its cousin bust or buster.
bolst: This is not a word, but probably it is a slang, but I’ve never seen it being used.
bolster: support or strengthen; prop up. This word is often used on buildings or pillows–something to support other things.
burst: (of a container) break suddenly and violently apart, spilling the contents, typically as a result of an impact or internal pressure. For example, burst into flames.
burster: a powerful short-lived bursts of radiation; a violent wave.
boast: talk with excessive pride and self-satisfaction about one’s achievements, possessions, or abilities.
boaster: A boaster is someone who is known for boasting and bragging.
bast: fibrous material from the phloem of a plant, used as fiber in matting, cord, etc.
baste: pour juices or melted fat over (meat) during cooking in order to keep it moist. This word is often used during Thanksgiving when a turkey is roasted in the oven.
baster: a person who bastes meat or other food.
bastion: a projecting part of a fortification built at an angle to the line of a wall, so as to allow defensive fire in several directions. It is more often used to describe an institution, place, or person strongly defending or upholding particular principles, attitudes, or activities.
bist: Not a word.
bister: a brownish-yellowish pigment made from the soot of burned wood.