floor

Synonyms: basement boards canvas carpet cellar deck downstairs flat flooring ground landing lowest point mat mezzanine nadir rug stage story tier upstairs

Antonyms: ceiling

Synonyms: baffle beat bewilder bowl over bring down bring up short conquer defeat discomfit disconcert down drop dumbfound fell flatten ground knock down lay low level nonplus overthrow prostrate puzzle stump throw

Antonyms: clear up explain