mix in vs blend

mix in is not a noun while blend is a noun.

Word	Noun	Adjective	Verb	Adverb
mix in	No	No	Yes	No
blend	Yes	No	Yes	No

As verbs, blend is a hypernym of mix in; that is, blend is a word with a broader meaning than mix in:

Other hypernyms of mix in include coalesce, combine, commingle, conflate, flux, fuse, immix, meld, merge, mix.

mix in (noun)	blend (noun)
	the act of blending components together thoroughly
	a new word formed by joining two others and combining their meanings
	an occurrence of thorough mixing

mix in (verb)	blend (verb)
cause (something) to be mixed with (something else)	mix together different elements
add as an additional element or part	combine into one
	blend or harmonize