Probably though Sikhism is closer to Hinduism than Islam.
Sikhism is not part of Abrahamic faith.
Guru Nanak has no Prophetic lineage like the Prophets of the Abrahamic faith.
Guru Nanak decided to create a religion on his own and followed teachings of Hinduism and Islam, extra and call it as Sikhism.
I would assume so, though Hinduism could be classified as polymorphic monotheism, the belief that their deity (Brahman) exists in multiple forms (Rama, Vishnu, etc.).
No i is not. Sikhism is a new religion Hinduism and Islam both think women are dirt and scums. Sikhism does not. Sikhism is one of the most scientific religions around. Heres a link