Theater comes from viewing btw, just like spectacle comes from seeing (spectator)
harēna f (genitive harēnae); first declension
arena (venue for spectacles)
The above is neither as alliterative nor as assonant as some will claim, as the sounds made by the repeated a's do not consistently match. Alliteration is difficult with vowels, and assonance is much more common in the main vowels in a word (think 'the rain in spain').
Man I'm a nerd.
edit: to be honest patrician really doesnt ring a bell, ok I was 13 when we got taught about plebs, but I almost feel like somehow we skipped the word in this quiz, cause no recognition whatsoever ( well there is but not from school time, just the obvious root the word has)