mortise vs mortise joint

mortise and mortise joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
mortise	Yes	No	Yes	No
mortise joint	Yes	No	No	No

mortise (noun)	mortise joint (noun)
a square hole made to receive a tenon and so to form a joint	a joint made by inserting tenon on one piece into mortise holes in the other
	a gliding joint between the distal ends of the tibia and fibula and the proximal end of the talus

mortise (verb)	mortise joint (verb)
join by a tenon and mortise
cut a hole for a tenon in