blend vs grow together

blend is a noun but grow together is not a noun.

Word	Noun	Adjective	Verb	Adverb
blend	Yes	No	Yes	No
grow together	No	No	Yes	No

As verbs, grow together is a hyponym of blend; that is, grow together is a word with a more specific, narrower meaning than blend:

Other hyponyms of blend include gauge, absorb, meld, melt, blend in, mix in, accrete, conjugate, admix, alloy, syncretise, syncretize.

blend (noun)	grow together (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

blend (verb)	grow together (verb)
mix together different elements	grow together (of plants and organs)
combine into one
blend or harmonize