Help - the evil word splitter has been cleaving words in two with an evil curse! Fortunately, the word split in two can be reunited by saying its name correctly. But unfortunately, each half of the word can only talk about its own name and can only tell you what it is by a short riddle. Also, we don't know which half comes first or second. Hear what one poor word that has been split in two has got to say:
One half:
I have been a vice for many great thinkers over the ages to fully define exactly what I am.
I am the Good at times but also the Evil at others.
I have a twin sister: but I can't say her name although I can say her name rhymes with 'capacity'.
Currently, I am unfortunately missing a letter to complete my name: you can find this letter at the start of a smile.
The other half:
I am a youngster in the history of mankind.
My creator made me as a bond between land and sea.
Lately I am mainly the associate of vanity.
But numbers are my true friends.
Please help this poor word by finding out what it is!
Hint
For the top riddle: Plato, Aristotle and Kant. Bottom: You most likely own one Complete word: How do I pronounce borough?