diff --git a/geocoder/admin0/sql/geocoder.sql b/geocoder/admin0/sql/geocoder.sql
index db86171..d166a29 100644
--- a/geocoder/admin0/sql/geocoder.sql
+++ b/geocoder/admin0/sql/geocoder.sql
@@ -1,3 +1,4 @@
+--- Geocoding function ---
 --CREATE TYPE geocode_admin_v1 AS (q TEXT, geom GEOMETRY, success BOOLEAN);
 
 CREATE OR REPLACE FUNCTION geocode_admin0_polygons(name text[])
@@ -10,3 +11,16 @@ CREATE OR REPLACE FUNCTION geocode_admin0_polygons(name text[])
     SELECT d.q, n.the_geom as geom, CASE WHEN s.adm0_a3 IS NULL then FALSE ELSE TRUE END AS success 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 LEFT OUTER JOIN ne_admin0_v3 n ON s.adm0_a3 = n.adm0_a3 GROUP BY d.q, n.the_geom, s.adm0_a3;
 END
 $$ LANGUAGE 'plpgsql' SECURITY DEFINER;
+
+--- Helper functions ---
+
+-- admin0_synonym_lookup
+CREATE OR REPLACE FUNCTION admin0_synonym_lookup(name text[])
+ RETURNS SETOF synonym_lookup_v1 AS $$
+ DECLARE
+    ret synonym_lookup_v1%rowtype;
+ BEGIN  RETURN QUERY
+    SELECT d.q, s.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, s.adm0_a3;
+END
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;
+