manila paper vs manilla paper

manila paper and manilla paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
manila paper	Yes	No	No	No
manilla paper	Yes	No	No	No

As nouns, manila paper and manilla paper are synonyms defined as:

manila paper and manilla paper: a strong paper or thin cardboard with a smooth light brown finish made from e.g. Manila hemp

Other synonyms of manila paper include manila, manilla.

manila paper (noun)	manilla paper (noun)
a strong paper or thin cardboard with a smooth light brown finish made from e.g. Manila hemp	a strong paper or thin cardboard with a smooth light brown finish made from e.g. Manila hemp