A four-letter synonym for Ireland is "Eire" - but this is not an abbreviation.
An four letter abbreviation for Connecticut is Conn.
The four-letter abbreviation for St. Paul is "STPL." This abbreviation is commonly used in various contexts, such as postal services and transportation.
USPS
four letter word for facts: data (also info, but that's an abbreviation)
crts (abbreviation for cathode ray tubes)
The standard two letter abbreviation for the state of South Dakota is SD.
the capital is Regina
the abbreviation is T
83
Supersonic transport Abbreviation: SST and pl. SSTS
The word for Ireland in the Irish language is Éire.