You could use a function similar to this also, it would allow you to add in different cases where you would like to change values:
Public Function strReplace(varValue As Variant) as Variant
Select Case varValue
Case "Avenue"
strReplace = "Ave"
Case "North"
strReplace = "N"
Case Else
strReplace = varValue
End Select
End Function
Then your SQL would read something like:
SELECT strReplace(Address) As Add FROM Tablename