muzzle has 2 distinct synonyms spread across 4 of its 7 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is unmuzzle.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
forward projecting part of the head of certain animals; includes the jaws and nose
a leather or wire restraint that fits over an animal's snout (especially a dog's nose and jaws) and prevents it from eating or biting
Synonyms, antonyms and the broader and narrower relations for muzzle come from Princeton University’s WordNet. Full sources and licences.