is a completely free, open-source office suite that is compatible with Mac OS X 10.7.5.
Once installed, go to the Help menu in any Office app and select Check for Updates . Since Microsoft no longer updates Office 2011, there may not be any available, but if the Microsoft AutoUpdate tool runs, it might find the final "Service Pack" updates that improve stability on Lion. Microsoft Office For Mac Os X 10.7 5 Free Download