Words in English language are more short than in other langs usually.

Tabs don't fits in line in Spanish/German/Russian when they has two words.
Wallet has limited functionality. It can send & receive coins. So we can
safely rename "Send coins" to "Send" and "Receive coins" to "Receive".
Address book is just stored addresses.

src/qt/bitcoingui.cpp

@@ -167,14 +167,14 @@ void BitcoinGUI::createActions()
     overviewAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_1));
     tabGroup->addAction(overviewAction);
 
-    sendCoinsAction = new QAction(QIcon(":/icons/send"), tr("&Send coins"), this);
+    sendCoinsAction = new QAction(QIcon(":/icons/send"), tr("&Send"), this);
     sendCoinsAction->setStatusTip(tr("Send coins to a Bitcoin address"));
     sendCoinsAction->setToolTip(sendCoinsAction->statusTip());
     sendCoinsAction->setCheckable(true);
     sendCoinsAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_2));
     tabGroup->addAction(sendCoinsAction);
 
-    receiveCoinsAction = new QAction(QIcon(":/icons/receiving_addresses"), tr("&Receive coins"), this);
+    receiveCoinsAction = new QAction(QIcon(":/icons/receiving_addresses"), tr("&Receive"), this);
     receiveCoinsAction->setStatusTip(tr("Show the list of addresses for receiving payments"));
     receiveCoinsAction->setToolTip(receiveCoinsAction->statusTip());
     receiveCoinsAction->setCheckable(true);
@@ -188,7 +188,7 @@ void BitcoinGUI::createActions()
     historyAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_4));
     tabGroup->addAction(historyAction);
 
-    addressBookAction = new QAction(QIcon(":/icons/address-book"), tr("&Address Book"), this);
+    addressBookAction = new QAction(QIcon(":/icons/address-book"), tr("&Addresses"), this);
     addressBookAction->setStatusTip(tr("Edit the list of stored addresses and labels"));
     addressBookAction->setToolTip(addressBookAction->statusTip());
     addressBookAction->setCheckable(true);