1. The ordinal number of sixty-four in counting order
   - sixty-fourth

See also: ordinal

• upholstery material
• upholstery needle
• Upjohn
• upkeep
• upland
• upland cotton
• upland plover
• upland sandpiper
• upland white aster
• uplift
• uplifted
• uplifting
• upliftment=
• uplink
• upload
• uplook
• upmarket
• upmost
• upon
• upon one's guard
• upper
• Upper Avon
• salt lick
• salt marsh
• salt marsh mallow