Synonyms for john

a room or building equipped with one or more toilets (noun)

• toilet
• lavatory
• lav
• can
• privy
• bathroom

youngest son of Henry II (noun)

(New Testament) disciple of Jesus (noun)

a prostitute's customer (noun)

• whoremaster
• whoremonger
• trick

the last of the four Gospels in the New Testament (noun)