portmanteau vs blend

portmanteau and blend both are nouns.

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

As nouns, portmanteau and blend are synonyms defined as:

portmanteau and blend: a new word formed by joining two others and combining their meanings

Other synonyms of portmanteau include portmanteau word.

portmanteau (noun)	blend (noun)
a large travelling bag made of stiff leather	the act of blending components together thoroughly
a new word formed by joining two others and combining their meanings	a new word formed by joining two others and combining their meanings
	an occurrence of thorough mixing

portmanteau (verb)	blend (verb)
	mix together different elements
	combine into one
	blend or harmonize