Vulgariser is a word that means to make something common or accessible, often by simplifying it or making it less elite or sophisticated. Synonyms for vulgariser include popularize, simplify, dumb down, make accessible, democratize, popularize, water down and make palatable. These words all have a similar meaning to vulgariser and can be used interchangeably depending on the context of the sentence. When you want to make something more accessible or more understandable to a wider audience, you can use any of these synonyms for vulgariser to convey your meaning effectively. Remember that language is a powerful tool, so choose your words carefully.