Nimbudocs Editor provides fonts with the intention of being metrical identical to Microsoft fonts as follows:

Arimo -> Arial
Tinos -> Times New Roman
Cousine -> Courier New
Carlito -> Calibri 
Caladea -> Cambria

All other fonts might be more or less similar to other (MS) fonts but weren't added for the purpose of having specific (MS) font equivalents but rather to have a range of choices for fonts in the editor.