diff --git a/ispell-words b/ispell-words
index ff0f3120..baf215e8 100644
--- a/ispell-words
+++ b/ispell-words
@@ -117,6 +117,7 @@ argJsonHelp
 argJsonKey
 argJsonObject
 argKeepFilesOpen
+argKeepFilesOpenThreshold
 argKeepInlineImages
 argLinearize
 argLinearizePass
@@ -142,6 +143,7 @@ argPreserveUnreferencedResources
 argProgress
 argQdf
 argRawStreamData
+argRemovePageLabels
 argRotate
 args
 argShowEncryption
@@ -688,6 +690,7 @@ fullname
 fullpad
 func
 fv
+fvisibility
 fweimer
 fwrite
 fx
@@ -1450,6 +1453,7 @@ pdfs
 pdh
 pdlin
 pe
+performant
 perl
 persistAcrossFinish
 Pfeifle
@@ -2044,15 +2048,21 @@ Wconversion
 wcslen
 Weimer
 werror
+wfilename
+wfilenamep
 WFLAGS
+wfopen
 whoami
 WinAnsi
 winansi
 WinAnsiEncoding
 wincrypt
 WindowsCryptProvider
+wlen
 wmain
 wmatrix
+wmode
+wmodep
 Wold
 wrapInArray
 writeAppearance
diff --git a/libqpdf/QPDF_Real.cc b/libqpdf/QPDF_Real.cc
index b4c8283f..396ea25f 100644
--- a/libqpdf/QPDF_Real.cc
+++ b/libqpdf/QPDF_Real.cc
@@ -26,7 +26,7 @@ JSON
 QPDF_Real::getJSON()
 {
     // While PDF allows .x or -.x, JSON does not. Rather than
-    // convering from string to double and back, just handle this as a
+    // converting from string to double and back, just handle this as a
     // special case for JSON.
     std::string result;
     if (this->val.length() == 0)