mitre vs miter joint

mitre and miter joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
mitre	Yes	No	No	No
miter joint	Yes	No	No	No

As nouns, mitre and miter joint are synonyms defined as:

mitre and miter joint: joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner

Other synonyms of mitre include miter, mitre joint.

mitre (noun)	miter joint (noun)
a liturgical headdress worn by bishops on formal occasions	joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner
the surface of a beveled end of a piece where a miter joint is made
joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner