diff --git a/learning_resources_search/constants.py b/learning_resources_search/constants.py
index 6cf1ad993c..78757dad6d 100644
--- a/learning_resources_search/constants.py
+++ b/learning_resources_search/constants.py
@@ -90,13 +90,13 @@ class FilterConfig:
 
 ENGLISH_TEXT_FIELD = {
     "type": "text",
-    "fields": {"english": {"type": "text", "analyzer": "english"}},
+    "fields": {"english": {"type": "text", "analyzer": "custom_english"}},
 }
 
 ENGLISH_TEXT_FIELD_WITH_SUGGEST = {
     "type": "text",
     "fields": {
-        "english": {"type": "text", "analyzer": "english"},
+        "english": {"type": "text", "analyzer": "custom_english"},
         "trigram": {"type": "text", "analyzer": "trigram"},
     },
 }
@@ -429,3 +429,13 @@ class FilterConfig:
     },
     **LEARNING_RESOURCE_SORTBY_OPTIONS,
 }
+
+SYNONYMS = [
+    "ai, ml, artificial intelligence, machine learning",
+    "math, mathematics",
+    "chem, chemistry",
+    "bio, biology",
+    "econ, economics",
+    "natural language processing, nlp",
+    "large language model, llm",
+]
diff --git a/learning_resources_search/indexing_api.py b/learning_resources_search/indexing_api.py
index 0b8803dcdd..6904db5b9a 100644
--- a/learning_resources_search/indexing_api.py
+++ b/learning_resources_search/indexing_api.py
@@ -26,6 +26,7 @@
     COURSE_TYPE,
     MAPPING,
     PERCOLATE_INDEX_TYPE,
+    SYNONYMS,
     IndexestoUpdate,
 )
 from learning_resources_search.exceptions import ReindexError
@@ -143,26 +144,41 @@ def clear_and_create_index(*, index_name=None, skip_mapping=False, object_type=N
             },
             "analysis": {
                 "analyzer": {
-                    "folding": {
+                    "trigram": {
                         "type": "custom",
+                        "tokenizer": "standard",
+                        "filter": ["lowercase", "synonyms_filter", "shingle"],
+                    },
+                    "custom_english": {
                         "tokenizer": "standard",
                         "filter": [
+                            "english_possessive_stemmer",
                             "lowercase",
-                            "asciifolding",  # remove accents if we use folding analyzer
+                            "synonyms_filter",
+                            "english_stop",
+                            "english_keywords",
+                            "english_stemmer",
                         ],
                     },
-                    "trigram": {
-                        "type": "custom",
-                        "tokenizer": "standard",
-                        "filter": ["lowercase", "shingle"],
-                    },
                 },
                 "filter": {
                     "shingle": {
                         "type": "shingle",
                         "min_shingle_size": 2,
                         "max_shingle_size": 3,
-                    }
+                    },
+                    "english_stop": {"type": "stop", "stopwords": "_english_"},
+                    "english_keywords": {"type": "keyword_marker", "keywords": []},
+                    "english_stemmer": {"type": "stemmer", "language": "english"},
+                    "english_possessive_stemmer": {
+                        "type": "stemmer",
+                        "language": "possessive_english",
+                    },
+                    "synonyms_filter": {
+                        "type": "synonym_graph",
+                        "synonyms": SYNONYMS,
+                        "expand": "true",
+                    },
                 },
             },
         }