Question

IS  NOUN  SIMILAR  TO  PRO NOUN IN HINDI 

Answer 1

..The first person personal pronouns in Hindi are मैं (“I”) and हम (“we”). In colloquial Hindi, हम may be used to refer to a single person. Regardless, हम is always grammatically plural. Women may use masculine plural forms when using हम to refer to themselves, as in “हम अच्छे हैं” {I am fine”, literally “We are fine (masculine plural)}. The word “लोग” (people) may be used to explicitly differentiate singular and plural references, as in “हम लोग” (we people)

Answer 2

No.
sangya(noun) vo shabd hote h jo ki kisi insaan, prani, jagah, bhaav aadi k naam ka bodh karate h. Aur vyaktivachak sangya jaise seeta, meena, raj, etc ki jagah par ham sarvanam(pronoun) jaise me, vah, tum tec. shabdo ka upyog karte h. 

:)