blank, barren, void, vacant
Synonyms would be idiot, stupid, or empty-headed.
empty
Empty
Abandoned Empty
empty
alienation
Yes, micturition is another word for urination.
You could use: clean, white and vacuous.
desert
Which word means 'empty out
One term for empty talk would be chatter. Another could be bluster or blather. Empty talk could also mean mere rhetoric.
Another word for thick would be big, and an antonym for this word would be thin.