blend vs meld

blend and meld both are nouns.

Word	Noun	Adjective	Verb	Adverb
blend	Yes	No	Yes	No
meld	Yes	No	Yes	No

As verbs, blend and meld are synonyms defined as:

Other synonyms of blend include coalesce, combine, commingle, conflate, flux, fuse, immix, merge, mix.

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

blend (noun)	meld (noun)
the act of blending components together thoroughly	a form of rummy using two decks of cards and four jokers; jokers and deuces are wild; the object is to form groups of the same rank
a new word formed by joining two others and combining their meanings
an occurrence of thorough mixing

blend (verb)	meld (verb)
mix together different elements	mix together different elements
combine into one	lose its distinct outline or shape; blend gradually
blend or harmonize	announce for a score; of cards in a card game