diff --git a/core/sequences/sequences.factor b/core/sequences/sequences.factor
index 1d3b12fa75..f209adfa6f 100644
--- a/core/sequences/sequences.factor
+++ b/core/sequences/sequences.factor
@@ -1043,16 +1043,10 @@ M: object sum 0 [ + ] binary-reduce ; inline
         [ [ 2drop ] 2dip ] [ 2drop ] if
     ] curry 1 each-from drop ; inline
 
-: filter-length ( seq n -- seq' ) swap [ length = ] with filter ;
-
 : shortest ( seqs -- elt ) [ length ] infimum-by ;
 
 : longest ( seqs -- elt ) [ length ] supremum-by ;
 
-: all-shortest ( seqs -- seqs' ) dup shortest length filter-length ;
-
-: all-longest ( seqs -- seqs' ) dup longest length filter-length ;
-
 ! We hand-optimize flip to such a degree because type hints
 ! cannot express that an array is an array of arrays yet, and
 ! this word happens to be performance-critical since the compiler
diff --git a/extra/anagrams/anagrams.factor b/extra/anagrams/anagrams.factor
index b5374ed965..7150fa8b28 100644
--- a/extra/anagrams/anagrams.factor
+++ b/extra/anagrams/anagrams.factor
@@ -1,9 +1,8 @@
 ! Copyright (C) 2010 John Benediktsson
 ! See http://factorcode.org/license.txt for BSD license
 
-USING: arrays ascii assocs fry io.encodings.ascii io.files
-kernel math math.order memoize sequences sorting
-math.statistics ;
+USING: ascii assocs fry io.encodings.ascii io.files kernel math
+math.statistics memoize sequences sequences.extras sorting ;
 FROM: sets => members ;
 IN: anagrams
 
diff --git a/extra/rosetta-code/ordered-words/ordered-words.factor b/extra/rosetta-code/ordered-words/ordered-words.factor
index e0ca3cd140..63ecdb87a8 100644
--- a/extra/rosetta-code/ordered-words/ordered-words.factor
+++ b/extra/rosetta-code/ordered-words/ordered-words.factor
@@ -1,7 +1,7 @@
 ! Copyright (c) 2012 Anonymous
 ! See http://factorcode.org/license.txt for BSD license.
-USING: fry grouping http.client io io.encodings.utf8 io.files
-io.files.temp kernel math math.order memoize sequences
+USING: grouping http.client io io.encodings.utf8 io.files
+io.files.temp kernel math memoize sequences sequences.extras
 unicode.case urls ;
 IN: rosetta-code.ordered-words
 
@@ -24,7 +24,7 @@ MEMO: word-list ( -- seq )
     ] unless utf8 file-lines ;
 
 : ordered-word? ( word -- ? )
-    >lower 2 <clumps> [ first2 <= ] all? ;
+    >lower [ <= ] monotonic? ;
 
 : ordered-words-main ( -- )
     word-list [ ordered-word? ] filter
diff --git a/extra/sequences/extras/extras.factor b/extra/sequences/extras/extras.factor
index 803c0e5bd9..e28a6977c0 100644
--- a/extra/sequences/extras/extras.factor
+++ b/extra/sequences/extras/extras.factor
@@ -390,3 +390,9 @@ PRIVATE>
 
 : map-find-index ( ... seq quot: ( ... elt index -- ... result/f ) -- ... result elt index )
     [ find-index ] (map-find-index) ; inline
+
+: filter-length ( seq n -- seq' ) swap [ length = ] with filter ;
+
+: all-shortest ( seqs -- seqs' ) dup shortest length filter-length ;
+
+: all-longest ( seqs -- seqs' ) dup longest length filter-length ;