A four-letter synonym for Ireland is "Eire" - but this is not an abbreviation.
An four letter abbreviation for Connecticut is Conn.
USPS
four letter word for facts: data (also info, but that's an abbreviation)
crts (abbreviation for cathode ray tubes)
the capital is Regina
The standard two letter abbreviation for the state of South Dakota is SD.
the abbreviation is T
83
Supersonic transport Abbreviation: SST and pl. SSTS
There is not a three letter abbreviation for Kiev. It is a two letter abbreviation which is KV. The abbreviation is typically used when booking airline travel.
The word for Ireland in the Irish language is Éire.