Parnahiba vs Parnaiba

Parnahiba and Parnaiba both are nouns.

Word	Noun	Adjective	Verb	Adverb
Parnahiba	Yes	No	No	No
Parnaiba	Yes	No	No	No

As nouns, Parnahiba and Parnaiba are synonyms defined as:

Parnahiba and Parnaiba: a river in northeastern Brazil that flows generally northward to the Atlantic Ocean

Parnahiba (noun)	Parnaiba (noun)
a river in northeastern Brazil that flows generally northward to the Atlantic Ocean	a river in northeastern Brazil that flows generally northward to the Atlantic Ocean