Word mod con/com
An initial 'con' may be rendered by 'com'
comi.us ADJ 3 2 NOM S N COMP
comi.us ADJ 3 2 VOC S N COMP
comi.us ADJ 3 2 ACC S N COMP
comis, come, comior -or -us, comissimus -a -um ADJ [XXXBO]
courteous/kind/obliging/affable/gracious; elegant, cultured, having good taste;
comius ADV COMP
comiter, comius, comissime ADV [XXXCO]
courteously/kindly/civilly, readily; in friendly/sociable manner; w/good will;

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.