Nidor is a noun that refers to a noxious odor or stench. Some synonyms for this word include foul smell, bad scent, noisome odor, rotten stench, putrid aroma, reek, and malodor. Other similar words one can use to describe a nasty smell include pungent, acrid, offensive, unbearable, disgusting, revolting, and nauseating. Using synonyms for a word like nidor can help to create a more descriptive and vivid literary language that engages the reader's senses. When writing, it's essential to choose the right words that convey the desired message, and by using different synonyms, one can achieve this goal to great effect.