diff --git a/geocoder/admin0/sql/synonym_service.sql b/geocoder/admin0/sql/synonym_service.sql
new file mode 100644
index 0000000..5b35c1a
--- /dev/null
+++ b/geocoder/admin0/sql/synonym_service.sql
@@ -0,0 +1,15 @@
+--CREATE TYPE synonym_lookup_v1 AS (q TEXT, adm0_a3 TEXT);
+
+--EXAMPLE
+-- SELECT (admin0_synonym_lookup(Array['United States', 'ESP'])).*
+
+CREATE OR REPLACE FUNCTION admin0_synonym_lookup(name text[])
+  RETURNS SETOF synonym_lookup_v1 AS $$
+  DECLARE 
+    ret synonym_lookup_v1%rowtype;
+  BEGIN
+  -- FOR ret IN
+  RETURN QUERY
+    SELECT d.q, n.adm0_a3 FROM (SELECT q, lower(regexp_replace(q, '[^a-zA-Z\u00C0-\u00ff]+', '', 'g'))::text x FROM (SELECT unnest(name) q) g) d LEFT OUTER JOIN admin0_synonyms s ON name_ = d.x GROUP BY d.q, n.adm0_a3;
+END
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;