diff --git a/misc/fuel/README b/misc/fuel/README
index 759f26c1b2..69e5a98299 100644
--- a/misc/fuel/README
+++ b/misc/fuel/README
@@ -122,6 +122,7 @@ beast.
     - C-cC-xr : extract region as a separate word
     - C-cC-xi : replace word at point by its definition
     - C-cC-xv : extract region as a separate vocabulary
+    - C-cC-xw : rename all uses of a word
 
 *** In the listener:
 
diff --git a/misc/fuel/fuel-mode.el b/misc/fuel/fuel-mode.el
index e30443f4fd..88ad73864a 100644
--- a/misc/fuel/fuel-mode.el
+++ b/misc/fuel/fuel-mode.el
@@ -198,10 +198,11 @@ interacting with a factor listener is at your disposal.
 (fuel-mode--key ?e ?w 'fuel-edit-word)
 (fuel-mode--key ?e ?x 'fuel-eval-definition)
 
-(fuel-mode--key ?x ?s 'fuel-refactor-extract-sexp)
-(fuel-mode--key ?x ?r 'fuel-refactor-extract-region)
-(fuel-mode--key ?x ?v 'fuel-refactor-extract-vocab)
 (fuel-mode--key ?x ?i 'fuel-refactor-inline-word)
+(fuel-mode--key ?x ?r 'fuel-refactor-extract-region)
+(fuel-mode--key ?x ?s 'fuel-refactor-extract-sexp)
+(fuel-mode--key ?x ?v 'fuel-refactor-extract-vocab)
+(fuel-mode--key ?x ?w 'fuel-refactor-rename-word)
 
 (fuel-mode--key ?d ?> 'fuel-show-callees)
 (fuel-mode--key ?d ?< 'fuel-show-callers)
diff --git a/misc/fuel/fuel-refactor.el b/misc/fuel/fuel-refactor.el
index f44234ae1b..061adbb82c 100644
--- a/misc/fuel/fuel-refactor.el
+++ b/misc/fuel/fuel-refactor.el
@@ -18,6 +18,8 @@
 (require 'fuel-syntax)
 (require 'fuel-base)
 
+(require 'etags)
+
 
 ;;; Word definitions in buffer
 
@@ -167,7 +169,28 @@ word."
 
 ;;; Rename word:
 
+(defsubst fuel-refactor--rename-word (from to file)
+  (let ((files (fuel-xref--word-callers-files from)))
+    (tags-query-replace from to t `(cons ,file ',files))
+    files))
 
+(defun fuel-refactor--def-word ()
+  (save-excursion
+    (fuel-syntax--beginning-of-defun)
+    (or (and (looking-at fuel-syntax--method-definition-regex)
+             (match-string-no-properties 2))
+        (and (looking-at fuel-syntax--word-definition-regex)
+             (match-string-no-properties 2)))))
+
+(defun fuel-refactor-rename-word (&optional arg)
+  "Rename globally the word whose definition point is at.
+With prefix argument, use word at point instead."
+  (interactive "P")
+  (let* ((from (if arg (fuel-syntax-symbol-at-point) (fuel-refactor--def-word)))
+         (from (read-string "Rename word: " from))
+         (to (read-string (format "Rename '%s' to: " from)))
+         (buffer (current-buffer)))
+    (fuel-refactor--rename-word from to (buffer-file-name))))
 
 
 ;;; Extract vocab:
diff --git a/misc/fuel/fuel-syntax.el b/misc/fuel/fuel-syntax.el
index 66b77df49e..6f33eb2993 100644
--- a/misc/fuel/fuel-syntax.el
+++ b/misc/fuel/fuel-syntax.el
@@ -244,7 +244,8 @@
     ;; Comments:
     ("\\_<\\(#?!\\) .*\\(\n\\|$\\)" (1 "<") (2 ">"))
     ("\\_<\\(#?!\\)\\(\n\\|$\\)" (1 "<") (2 ">"))
-    ("\\_<\\((\\) \\([^)\n]*?\\) \\()\\)\\_>" (1 "<b") (2 "w") (3 ">b"))
+    (" \\((\\)( \\([^\n]*\\) )\\()\\)\\( \\|\n\\)" (1 "<b") (2 "w") (3 ">b"))
+    (" \\((\\) \\([^\n]*\\) \\()\\)\\( \\|\n\\)" (1 "<b") (2 "w") (3 ">b"))
     ;; Strings
     ("\\( \\|^\\)\\(\"\\)[^\n\r\f]*\\(\"\\)\\( \\|\n\\)" (2 "\"") (3 "\""))
     ("\\_<<\\(\"\\)\\_>" (1 "<b"))
diff --git a/misc/fuel/fuel-xref.el b/misc/fuel/fuel-xref.el
index cae7923bee..4d444ebe3e 100644
--- a/misc/fuel/fuel-xref.el
+++ b/misc/fuel/fuel-xref.el
@@ -128,11 +128,17 @@ cursor at the first ocurrence of the used word."
       (message "")
       (fuel-popup--display (fuel-xref--buffer)))))
 
+(defun fuel-xref--callers (word)
+  (let ((cmd `(:fuel* (((:quote ,word) fuel-callers-xref)))))
+    (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
+
 (defun fuel-xref--show-callers (word)
-  (let* ((cmd `(:fuel* (((:quote ,word) fuel-callers-xref))))
-         (res (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
+  (let ((refs (fuel-xref--callers word)))
     (with-current-buffer (fuel-xref--buffer) (setq fuel-xref--word word))
-    (fuel-xref--fill-and-display word "using" res)))
+    (fuel-xref--fill-and-display word "using" refs)))
+
+(defun fuel-xref--word-callers-files (word)
+  (mapcar 'third (fuel-xref--callers word)))
 
 (defun fuel-xref--show-callees (word)
   (let* ((cmd `(:fuel* (((:quote ,word) fuel-callees-xref))))