blend vs portmanteau word

blend and portmanteau word both are nouns.

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

As nouns, blend and portmanteau word are synonyms defined as:

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

Other synonyms of blend include portmanteau.

blend (noun)	portmanteau word (noun)
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

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