coalescence vs jointure

coalescence and jointure both are nouns.

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

As nouns, jointure is a hypernym of coalescence; that is, jointure is a word with a broader meaning than coalescence:

coalescence: the union of diverse things into one body or form or group; the growing together of parts
jointure: the act of making or becoming a single unit

Other hypernyms of coalescence include conjugation, unification, union, uniting.

coalescence (noun)	jointure (noun)
the union of diverse things into one body or form or group; the growing together of parts	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