I like the word "solitude" because it doesn't imply being "lonely".
I'm with you. I also like "quietude." In fact, most words that end in the suffix, "tude" (state of or condition of) are usually darned good words: fortitude, gratitude, etc.
Peace,
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac