diff --git a/documentation/ethercat_doc.tex b/documentation/ethercat_doc.tex
index 381ff083..2e10b0a0 100644
--- a/documentation/ethercat_doc.tex
+++ b/documentation/ethercat_doc.tex
@@ -307,7 +307,7 @@ EtherCAT functionality (see \autoref{chap:api}).
 
   \item Accessing IDNs via the command-line tool.
 
-  \item Accessing IDNs at runtime via the the user-space library.
+  \item Accessing IDNs at runtime via the user-space library.
 
   \end{itemize}
 
diff --git a/tool/CommandDomains.cpp b/tool/CommandDomains.cpp
index 13fc6cb3..2eb446cd 100644
--- a/tool/CommandDomains.cpp
+++ b/tool/CommandDomains.cpp
@@ -77,7 +77,7 @@ string CommandDomains::helpString(const string &binaryBaseName) const
         << endl
         << "Command-specific options:" << endl
         << "  --domain  -d <index>  Positive numerical domain index." << endl
-        << "                        If ommitted, all domains are" << endl
+        << "                        If omitted, all domains are" << endl
         << "                        displayed." << endl
         << endl
         << "  --verbose -v          Show FMMUs and process data" << endl
diff --git a/tool/CommandPdos.cpp b/tool/CommandPdos.cpp
index 126b76c9..b805534e 100644
--- a/tool/CommandPdos.cpp
+++ b/tool/CommandPdos.cpp
@@ -64,7 +64,7 @@ string CommandPdos::helpString(const string &binaryBaseName) const
         << "Enable 1" << endl
         << endl
         << "2) Assigned PDOs - PDO direction, hexadecimal index and" << endl
-        << "   the PDO name, if avaliable. Note that a 'Tx' and 'Rx'" << endl
+        << "   the PDO name, if available. Note that a 'Tx' and 'Rx'" << endl
         << "   are seen from the slave's point of view. Example:" << endl
         << endl
         << "   TxPDO 0x1a00 \"Channel1\"" << endl
diff --git a/tool/CommandSlaves.cpp b/tool/CommandSlaves.cpp
index dedbc089..549068a7 100644
--- a/tool/CommandSlaves.cpp
+++ b/tool/CommandSlaves.cpp
@@ -58,7 +58,7 @@ string CommandSlaves::helpString(const string &binaryBaseName) const
         << endl
         << "1  5555:0  PREOP  +  EL3162 2C. Ana. Input 0-10V" << endl
         << "|  |    |  |      |  |" << endl
-        << "|  |    |  |      |  \\- Name from the SII if avaliable," << endl
+        << "|  |    |  |      |  \\- Name from the SII if available," << endl
         << "|  |    |  |      |     otherwise vendor ID and product" << endl
         << "|  |    |  |      |     code (both hexadecimal)." << endl
         << "|  |    |  |      \\- Error flag. '+' means no error," << endl