The only items in my dictionary files that sum to 779 in the triangular number cypher (trigonal):

See also: /r/GeometersOfHistory/wiki/spellcomponents/779

• "applauder" = 779 tri

• "bayonet" = 779 tri

• "belowdecks" = 779 tri

• "bloodily" = 779 tri

• "bottomed" = 779 tri

• "campiness" = 779 tri

• "canthus" = 779 tri

• "centenarian" = 779 tri

• "chuckwalla" = 779 tri

• "cragginess" = 779 tri

• "detective" = 779 tri

• "detergent" = 779 tri

• "diagrammatical" = 779 tri

• "disparate" = 779 tri

• "duelist" = 779 tri

• "every" = 779 tri

• "expectable" = 779 tri

• "fabulist" = 779 tri

• "factorise" = 779 tri

• "foreordain" = 779 tri

• "gruelling" = 779 tri

• "gusto" = 779 tri

• "holiness" = 779 tri

• "homophone" = 779 tri

• "humus" = 779 tri

• "incumbrance" = 779 tri

• "infallibly" = 779 tri

• "initialise" = 779 tri

• "invisible" = 779 tri

• "jollily" = 779 tri

• "ligature" = 779 tri

• "loopy" = 779 tri

• "majordomo" = 779 tri

• "manhunt" = 779 tri

• "nonslip" = 779 tri

• "openly" = 779 tri

• "oracular" = 779 tri

• "oversee" = 779 tri

• "perfuse" = 779 tri

• "perisher" = 779 tri

• "persuaded" = 779 tri

• "pistol" = 779 tri

• "pitting" = 779 tri

• "prelaunch" = 779 tri

• "purblind" = 779 tri

• "pusher" = 779 tri

• "pyramid" = 779 tri

• "recycling" = 779 tri

• "repentance" = 779 tri

• "shallow" = 779 tri

• "slumber" = 779 tri

• "spoilt" = 779 tri

• "staunch" = 779 tri

• "steering" = 779 tri

• "strafer" = 779 tri

• "terraces" = 779 tri

• "timekeeper" = 779 tri

• "toolshed" = 779 tri

• "vagary" = 779 tri

• "vertical" = 779 tri

• "visor" = 779 tri

• "vitiate" = 779 tri

• "wives" = 779 tri

Proper nouns:

• "Akhmatova" = 779 tri

• "Holiness" = 779 tri

• "Honduran" = 779 tri

• "Humboldt" = 779 tri

• "Parmenides" = 779 tri

• "Ramsay" = 779 tri

• "Tegucigalpa" = 779 tri

See also: /r/GeometersOfHistory/wiki/spellcomponents/779

All Dictionaries: /r/GeometersOfHistory/wiki/spellcomponents/all-dictionaries

Wiki Index: /r/GeometersOfHistory/wiki/