Niqab is NOT an Islamic practice, yes it practiced by many women in some Islamic countries, but it doesn't belong to Islam.
Biggest evidence is that its forbidden to wear it while performing the great pilgrimage or Haj in Mecca as well as Jews and Christians used to wear it decades ago.
And polygamy is also present in other religions as Mormon christians and orthodox jews
I would say it qualifies as Islamic, as there are some Muslims who believe it is sanctioned by Islam and others who wear it with a religious intention.
Zakah ends the same way as words like Makkah, Madinah or Kaabah, but for some reason, "zakat" is more popular in transliterations. It should always be allowed a type-in however (same for salah/t). Zakaah is asking to much in my sense.
I understand that some people transcribe "i" as "e" in words like jehad, but a word naqab is just a local distortion, and quizzes don't have to accommodate all local distortions, especially when they are not used in English texts.
Even when Muslims use a specific name, as they do for Jesus and John the Baptist, it refers to the very same person, so it is weird to talk about a "version".
On another note, the hint for zakah is OK but slightly inaccurate. What you described is zakah on gold and silver or their modern equivalents. There also are other types of zakah that are less known as they don't affect most people. They are paid on crops, minerals, merchandise, cattle and some other stuff, using different calculation rules