ola vs writing paper

ola and writing paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
ola	Yes	No	No	No
writing paper	Yes	No	No	No

As nouns, writing paper is a hypernym of ola; that is, writing paper is a word with a broader meaning than ola:

ola: leaf or strip from a leaf of the talipot palm used in India for writing paper
writing paper: paper material made into thin sheets that are sized to take ink; used for writing correspondence and manuscripts

ola (noun)	writing paper (noun)
leaf or strip from a leaf of the talipot palm used in India for writing paper	paper material made into thin sheets that are sized to take ink; used for writing correspondence and manuscripts