jointure vs uniting

jointure and uniting both are nouns.

Word	Noun	Adjective	Verb	Adverb
jointure	Yes	No	No	No
uniting	Yes	No	No	No

As nouns, jointure and uniting are synonyms defined as:

Other synonyms of jointure include conjugation, unification, union.

jointure (noun)	uniting (noun)
the act of making or becoming a single unit	the act of making or becoming a single unit
(law) an estate secured to a prospective wife as a marriage settlement in lieu of a dower	the combination of two or more commercial companies