diff --git a/all.sas b/all.sas
index baef181..349bdb3 100644
--- a/all.sas
+++ b/all.sas
@@ -1805,6 +1805,60 @@ Usage:
   %exit_success:
 
 %mend mf_verifymacvars;
+/**
+  @file
+  @brief Returns words that are in both string 1 and string 2
+  @details  Compares two space separated strings and returns the words that are
+  in both.
+  Usage:
+
+      %put %mf_wordsInStr1andStr2(
+        Str1=blah sss blaaah brah bram boo
+        ,Str2=   blah blaaah brah ssss
+      );
+
+  returns:
+  > blah blaaah brah
+
+  @param str1= string containing words to extract
+  @param str2= used to compare with the extract string
+
+  @warning CASE SENSITIVE!
+
+  @version 9.2
+  @author Allan Bowe
+
+**/
+
+%macro mf_wordsInStr1andStr2(
+  Str1= /* string containing words to extract */
+  ,Str2= /* used to compare with the extract string */
+)/*/STORE SOURCE*/;
+
+%local count_base count_extr i i2 extr_word base_word match outvar;
+%if %length(&str1)=0 or %length(&str2)=0 %then %do;
+  %put %str(WARN)ING: empty string provided!;
+  %put base string (str1)= &str1;
+  %put compare string (str2) = &str2;
+  %return;
+%end;
+%let count_base=%sysfunc(countw(&Str2));
+%let count_extr=%sysfunc(countw(&Str1));
+
+%do i=1 %to &count_extr;
+  %let extr_word=%scan(&Str1,&i,%str( ));
+  %let match=0;
+  %do i2=1 %to &count_base;
+    %let base_word=%scan(&Str2,&i2,%str( ));
+    %if &extr_word=&base_word %then %let match=1;
+  %end;
+  %if &match=1 %then %let outvar=&outvar &extr_word;
+%end;
+
+  &outvar
+
+%mend mf_wordsInStr1andStr2;
+
 /**
   @file
   @brief Returns words that are in string 1 but not in string 2
diff --git a/base/mf_wordsinstr1andstr2.sas b/base/mf_wordsinstr1andstr2.sas
new file mode 100644
index 0000000..1abadbd
--- /dev/null
+++ b/base/mf_wordsinstr1andstr2.sas
@@ -0,0 +1,54 @@
+/**
+  @file
+  @brief Returns words that are in both string 1 and string 2
+  @details  Compares two space separated strings and returns the words that are
+  in both.
+  Usage:
+
+      %put %mf_wordsInStr1andStr2(
+        Str1=blah sss blaaah brah bram boo
+        ,Str2=   blah blaaah brah ssss
+      );
+
+  returns:
+  > blah blaaah brah
+
+  @param str1= string containing words to extract
+  @param str2= used to compare with the extract string
+
+  @warning CASE SENSITIVE!
+
+  @version 9.2
+  @author Allan Bowe
+
+**/
+
+%macro mf_wordsInStr1andStr2(
+  Str1= /* string containing words to extract */
+  ,Str2= /* used to compare with the extract string */
+)/*/STORE SOURCE*/;
+
+%local count_base count_extr i i2 extr_word base_word match outvar;
+%if %length(&str1)=0 or %length(&str2)=0 %then %do;
+  %put %str(WARN)ING: empty string provided!;
+  %put base string (str1)= &str1;
+  %put compare string (str2) = &str2;
+  %return;
+%end;
+%let count_base=%sysfunc(countw(&Str2));
+%let count_extr=%sysfunc(countw(&Str1));
+
+%do i=1 %to &count_extr;
+  %let extr_word=%scan(&Str1,&i,%str( ));
+  %let match=0;
+  %do i2=1 %to &count_base;
+    %let base_word=%scan(&Str2,&i2,%str( ));
+    %if &extr_word=&base_word %then %let match=1;
+  %end;
+  %if &match=1 %then %let outvar=&outvar &extr_word;
+%end;
+
+  &outvar
+
+%mend mf_wordsInStr1andStr2;
+
diff --git a/tests/crossplatform/mf_wordsinstr1andstr2.test.sas b/tests/crossplatform/mf_wordsinstr1andstr2.test.sas
new file mode 100644
index 0000000..38a3c55
--- /dev/null
+++ b/tests/crossplatform/mf_wordsinstr1andstr2.test.sas
@@ -0,0 +1,20 @@
+/**
+  @file
+  @brief Testing mf_wordsinstr1andstr2 macro
+
+  <h4> SAS Macros </h4>
+  @li mf_wordsinstr1andstr2.sas
+  @li mp_assert.sas
+
+**/
+
+%let x=%mf_wordsinstr1andstr2(str1=xx DOLLAR x $CHAR xxx W MONNAME
+  ,str2=DOLLAR $CHAR W MONNAME xxxxxx
+);
+%mp_assert(
+  iftrue=(
+    "&x"="DOLLAR $CHAR W MONNAME"
+  ),
+  desc=Checking basic string,
+  outds=work.test_results
+)
diff --git a/tests/crossplatform/mf_wordsinstr1butnotstr2.test.sas b/tests/crossplatform/mf_wordsinstr1butnotstr2.test.sas
new file mode 100644
index 0000000..48fd6fc
--- /dev/null
+++ b/tests/crossplatform/mf_wordsinstr1butnotstr2.test.sas
@@ -0,0 +1,20 @@
+/**
+  @file
+  @brief Testing mf_wordsinstr1butnotstr2 macro
+
+  <h4> SAS Macros </h4>
+  @li mf_wordsinstr1butnotstr2.sas
+  @li mp_assert.sas
+
+**/
+
+%let x=%mf_wordsinstr1butnotstr2(str1=xx DOLLAR x $CHAR xxx W MONNAME
+  ,str2=ff xx x xxx xxxxxx
+);
+%mp_assert(
+  iftrue=(
+    "&x"="DOLLAR $CHAR W MONNAME"
+  ),
+  desc=Checking basic string,
+  outds=work.test_results
+)