diff --git a/core/math/intervals/intervals-tests.factor b/core/math/intervals/intervals-tests.factor
index f6317e7475..5204d7d45a 100755
--- a/core/math/intervals/intervals-tests.factor
+++ b/core/math/intervals/intervals-tests.factor
@@ -188,7 +188,7 @@ IN: math.intervals.tests
         { max interval-max }
     }
     "math.ratios.private" vocab [
-        { / interval/ } add
+        { / interval/ } suffix
     ] when
     random ;
 
diff --git a/core/prettyprint/prettyprint-tests.factor b/core/prettyprint/prettyprint-tests.factor
index 35b30ac46f..27b63ec26f 100755
--- a/core/prettyprint/prettyprint-tests.factor
+++ b/core/prettyprint/prettyprint-tests.factor
@@ -192,7 +192,7 @@ unit-test
         "IN: prettyprint.tests"
         ": another-soft-break-layout ( node -- quot )"
         "    parse-error-file"
-        "    [ <reversed> \"hello world foo\" add ] [ ] make ;"
+        "    [ <reversed> \"hello world foo\" suffix ] [ ] make ;"
     } ;
 
 [ t ] [
diff --git a/core/quotations/quotations-tests.factor b/core/quotations/quotations-tests.factor
index a4c9a619b5..d311dfad71 100755
--- a/core/quotations/quotations-tests.factor
+++ b/core/quotations/quotations-tests.factor
@@ -10,8 +10,8 @@ IN: quotations.tests
 ] unit-test
 
 [ [ 1 2 3 4 ] ] [ [ 1 2 ] [ 3 4 ] append ] unit-test
-[ [ 1 2 3 ] ] [ [ 1 2 ] 3 add ] unit-test
-[ [ 3 1 2 ] ] [ [ 1 2 ] 3 add* ] unit-test
+[ [ 1 2 3 ] ] [ [ 1 2 ] 3 suffix ] unit-test
+[ [ 3 1 2 ] ] [ [ 1 2 ] 3 prefix ] unit-test
 
 [ [ "hi" ] ] [ "hi" 1quotation ] unit-test
 
diff --git a/core/sequences/sequences-docs.factor b/core/sequences/sequences-docs.factor
index 9e8dcd6559..f5e5bfcdb3 100755
--- a/core/sequences/sequences-docs.factor
+++ b/core/sequences/sequences-docs.factor
@@ -61,8 +61,8 @@ ARTICLE: "sequences-access" "Accessing sequence elements"
 
 ARTICLE: "sequences-add-remove" "Adding and removing sequence elements"
 "Adding elements:"
-{ $subsection add }
-{ $subsection add* }
+{ $subsection prefix }
+{ $subsection suffix }
 "Removing elements:"
 { $subsection remove }
 { $subsection seq-diff } ;
@@ -641,22 +641,22 @@ HELP: push-new
 }
 { $side-effects "seq" } ;
 
-{ push push-new add add* } related-words
+{ push push-new prefix suffix } related-words
 
-HELP: add
+HELP: suffix
 { $values { "seq" sequence } { "elt" object } { "newseq" sequence } }
 { $description "Outputs a new sequence obtained by adding " { $snippet "elt" } " at the end of " { $snippet "seq" } "." }
 { $errors "Throws an error if the type of " { $snippet "elt" } " is not permitted in sequences of the same class as " { $snippet "seq1" } "." }
 { $examples
-    { $example "USING: prettyprint sequences ;" "{ 1 2 3 } 4 add ." "{ 1 2 3 4 }" }
+    { $example "USING: prettyprint sequences ;" "{ 1 2 3 } 4 suffix ." "{ 1 2 3 4 }" }
 } ;
 
-HELP: add*
+HELP: prefix
 { $values { "seq" sequence } { "elt" object } { "newseq" sequence } }
 { $description "Outputs a new sequence obtained by adding " { $snippet "elt" } " at the beginning of " { $snippet "seq" } "." }
 { $errors "Throws an error if the type of " { $snippet "elt" } " is not permitted in sequences of the same class as " { $snippet "seq1" } "." } 
 { $examples
-{ $example "USING: prettyprint sequences ;" "{ 1 2 3 } 0 add* ." "{ 0 1 2 3 }" }
+{ $example "USING: prettyprint sequences ;" "{ 1 2 3 } 0 prefix ." "{ 0 1 2 3 }" }
 } ;
 
 HELP: seq-diff
@@ -940,7 +940,7 @@ HELP: unclip
 { $values { "seq" sequence } { "rest" sequence } { "first" object } }
 { $description "Outputs a tail sequence and the first element of " { $snippet "seq" } "; the tail sequence consists of all elements of " { $snippet "seq" } " but the first." }
 { $examples
-    { $example "USING: prettyprint sequences ;" "{ 1 2 3 } unclip add ." "{ 2 3 1 }" }
+    { $example "USING: prettyprint sequences ;" "{ 1 2 3 } unclip suffix ." "{ 2 3 1 }" }
 } ;
 
 HELP: unclip-slice
diff --git a/extra/sequences/deep/deep-tests.factor b/extra/sequences/deep/deep-tests.factor
index 541570f3f9..9629d569cb 100755
--- a/extra/sequences/deep/deep-tests.factor
+++ b/extra/sequences/deep/deep-tests.factor
@@ -11,7 +11,7 @@ IN: sequences.deep.tests
 [ { { "foo" } "bar" } t ] [ { { "foo" } "bar" } [ array? ] deep-find* ] unit-test
 
 : change-something ( seq -- newseq )
-    dup array? [ "hi" add ] [ "hello" append ] if ;
+    dup array? [ "hi" suffix ] [ "hello" append ] if ;
 
 [ { { "heyhello" "hihello" } "hihello" } ]
 [ "hey" 1array 1array [ change-something ] deep-map ] unit-test