nightie or nighty /ʹnieti/noun (pl -ies) (pl nighties)

• subtotal
• subtract
• subtraction
• subtrahend
• subtropic
• subtropical
• subtropics
• subulate
• subunit
• suburb
• suburban
• suburbanise
• suburbanite
• suburbanize
• suburbia
• subvention
• subversion
• subversive
• subvert
• subway
• subwoofer
• suc-
• succedaneum
• succeed
• success