articulation has 6 distinct synonyms spread across 3 of its 5 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech
the shape or manner in which things come together and a connection is made
expressing in coherent verbal form
“the articulation of my feelings”
(anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)
the act of joining things in such a way that motion is possible
Synonyms, antonyms and the broader and narrower relations for articulation come from Princeton University’s WordNet. Full sources and licences.