Word mod o/u
An internal 'o' might be rendered by 'u'
murr.um N 1 1 GEN P F uncommon
murra, murrae N (1st) F [XXXEO] uncommon
fluorspar; agate?; highly prized mineral used for making vases;
myrrh (aromatic gum/ointment); tree source of myrrh (Commiphora schimperi);

Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.