blending vs confluence

blending and confluence both are nouns.

Word	Noun	Adjective	Verb	Adverb
blending	Yes	No	No	No
confluence	Yes	No	No	No

As nouns, confluence is a hyponym of blending; that is, confluence is a word with a more specific, narrower meaning than blending:

Other hyponyms of blending include conflux, merging, homogenisation, homogenization.

blending (noun)	confluence (noun)
a gradation involving small or imperceptible differences between grades	a flowing together
the act of blending components together thoroughly	a coming together of people
	a place where things merge or flow together (especially rivers)