The word "oinker" is a slang term that refers to a pig or a person who behaves like a pig. There are several synonyms that can be used instead of "oinker" to avoid using slang or offensive language. Some common synonyms include swine, hog, piggy, porker, and sow. These words are all commonly associated with the animal, and are therefore more appropriate when referring to a pig. Other synonyms that can be used when referring to a person who behaves in a pig-like manner include: glutton, hog, boor, and slob. These words are less commonly associated with pigs but still convey the negative behavior that is associated with the word "oinker".