"Nonsensical" is a word that means something lacking in sense or absurd. If you want to convey the same meaning in your writing with a bit of variation, you can use several synonyms. Some of the synonyms for nonsensical include irrational, ridiculous, illogical, preposterous, ludicrous, and absurd. Each of these words has similar meanings and can replace nonsensical in different contexts depending on what you want to convey and the tone you want to achieve. It's always helpful to have a diverse vocabulary, and knowing different synonyms for nonsensical is an excellent way to improve your writing skills.