The place of worship is called Masjid where Muslims go to worship and pray
Muslims are the people who believed in Islam.
The Muslims
you call " Islam" the religion
Jewish people would call it apostasy.
we better call them "must" duties.Yes they are on first place
They are called 'Sahaba' (in Arabic) or companions.
The indigenous people of Australia call the place of eels Parramatta.
is it nomads
due to lack of knowledge of Islam in earlier days people don't know what to do and what to not,what is halal and what is haram.after advent(after the arrival of Islam) of Islam people slowly gained the knowledge of Islam this lead to the impact on society by passing the principles of Islam to ane by one.
Yes you can call people these names. Iman is a female name Islam as far as I know is suitable for both male and female.
a path
They are called travelers.