What is a another word for solitude?

Question

I check the thesaurus, but I am not sure which one of them is the best fit.

As in "In the solitude of Keith's room"

Answer 1

I found five words that would fit, depending upon the intentions of the author.

isolation, loneliness, privacy, seclusion, solitariness

Answer 2

thank you

Answer 3

You're welcome.