You can learn the definition of the word virulence online through websites such as Merrriam-Webster, Dictionary, and Vocabulary. You can also buy a dictionary in order to look up the word in there.
loner
One Word Description
Optimal
One describing word (or adjective) is the word kinky.
The word, elapse, would fit your description.
One.
One can learn about reparation from dictionaries. Dictionaries offer not only meaning to the word reparation but antonyms and synonyms for the word reparation as well.
There is one word that fits this description: "Olive".
there is not one
Black And White! The word means "one color".
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