"none" or "nil" - No Border
"solid" or "single" - Single Line Border
"thick" - Single Line Border
"double" - Double Line Border
"dotted" - Dotted Line Border
"dashed" - Dashed Line Border
"dotDash" - Dot Dash Line Border
"dotDotDash" - Dot Dot Dash Line Border
"triple" - Triple Line Border
"thinThickSmallGap" - Thin, Thick Line Border
"thickThinSmallGap" - Thick, Thin Line Border
"thinThickThinSmallGap" - Thin, Thick, Thin Line Border
"thinThickMediumGap" - Thin, Thick Line Border
"thickThinMediumGap" - Thick, Thin Line Border
"thinThickThinMediumGap" - Thin, Thick, Thin Line Border
"thinThickLargeGap" - Thin, Thick Line Border
"thickThinLargeGap" - Thick, Thin Line Border
"thinThickThinLargeGap" - Thin, Thick, Thin Line Border
"wave" - Wavy Line Border
"doubleWave" - Double Wave Line Border
"dashSmallGap" - Dashed Line Border
"dashDotStroked" - Dash Dot Strokes Line Border
"threeDEmboss" or "ridge" - 3D Embossed Line Border
"threeDEngrave" or "groove" - 3D Engraved Line Border
"outset" - Outset Line Border
"inset" - Inset Line Border
Non-supported Word border styles will default to "solid".