hock-joint vs articulatio

hock-joint and articulatio both are nouns.

Word	Noun	Adjective	Verb	Adverb
hock-joint	Yes	No	No	No
articulatio	Yes	No	No	No

As nouns, articulatio is a hypernym of hock-joint; that is, articulatio is a word with a broader meaning than hock-joint:

hock-joint: tarsal joint of the hind leg of hoofed mammals; corresponds to the human ankle
articulatio: (anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)

Other hypernyms of hock-joint include articulation, joint.

hock-joint (noun)	articulatio (noun)
tarsal joint of the hind leg of hoofed mammals; corresponds to the human ankle	(anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)