Hindi word for English word "Paper"

What is the Hindi word for "Paper"? I want to know proper Hindi word and not Urdu word.

 

A Hindi word for English word "Paper" is पत्र. 

Platts also mentions "patr" (पत्र) meaning "paper" amongst its other meanings in Hindi.

पत्त्त्र pattra, पत्र patra, patr, vulg. pattar, s.m. a leaf prepared for writing on, paper

http://dsal.uchicago.edu/cgi-bin/philologic/getobject.pl?c.1:1:4945.platts

Application can be seen in "Newspaper" in English is called "समाचार पत्र" in Hindi. Or in "Question Paper" in English which is called "Prashn Patr" प्रश्न पत्र in Hindi. An interesting poem mentions it:

टीचर प्रश्‍न पत्र हाथो मे ले सब को ललचाता है ,

आँखो के इशारे से उसकी :ग्रॅविटी” समझता है !

दिल भी कुछ छण के लिए धड़कना भूल जाता है ,

सचमुच ऐसा होता है जब आता है “प्रश्‍न पत्र हाथ मे” !

Along with meaning only "paper", "patr" also means "a letter" or a "leaf of a plant/tree" (may be having similarities with the fact that earliest times we used to write over leaves as paper.

Also, a "certificate" is called "pramaan patr" प्रमाण पत्र in Hindi. For example, a poem mentions it:

पत्नी बोली आकर पति से,
श्रीमान जी,इधर तो आओ,...
प्रेम बस मुझे करते हो,
प्रमाण पत्र दिखलाओ..

Also, a "sheet" of paper is called "prishth" पृष्ठ in Hindi.