Stinko is a colloquial term that refers to a strong and unpleasant odor. There are many synonyms for this word, each with its own nuances and connotations. Some of the most common synonyms for stinko include pungent, malodorous, rank, fetid, putrid, and reeking. Other synonyms that may be appropriate in certain contexts include noxious, foul, funky, rancid, and musty. The choice of synonym will depend on the specific circumstances and the desired tone or effect of the sentence or passage. Regardless of which synonym is used, however, the meaning is clear - something smells bad!