Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: moral characteristic 
Words: concise, frank, matter of fact, pork, blunt
pork

Category: animal 
Words: stingray, horse, iguana, wrestle, fish
wrestle

Category: alcoholic drinks 
Words: tonic, canasta, brandy, tequila, gin

canasta