Save you some typing... use find and replace with your column name.
Table.ReplaceValue(#"Col 1", each [YOURCOLUMN],
each if [YOURCOLUMN] ="STREET" then "ST"
else if [YOURCOLUMN] ="ROAD" then "RD"
else if [YOURCOLUMN] ="DRIVE" then "DR"
else if [YOURCOLUMN] ="COURT" then "CT"
else if [YOURCOLUMN] ="LANE" then "LN"
else if [YOURCOLUMN] ="BOULEVARD" then "BLVD"
else if [YOURCOLUMN] ="EXPRESSWAY" then "EXPY"
else if [YOURCOLUMN] ="EXTENSION" then "EXT"
else if [YOURCOLUMN] ="FREEWAY" then "FWY"