--Script--
Venom = {

["curare"] = true,
["xentio"] = true,
["vardrax"] = true,
["euphorbia"] = true,
["voyria"] = true,
["eurypteria"] = true,
["darkshade"] = true,
["vernalius"] = true,
["kalmia"] = true,
["digitalis"] = true,
["delphinium"] = true,
["aconite"] = true,
["larkspur"] = true,
["monkshood"] = true,
["selarnia"] = true,
["prefarar"] = true,
["slike"] = true,

}

--Trigger, set to regex--
^You rub some (\w+) on a vorpal sword\.$

for i,mat in ipairs(matches) do
    if Venom[matches[i]] then
        selectCaptureGroup(i)
        fg("red")
        bg("black")
        resetFormat()
    end
end

Note: If you didn't want to use a table, and only highlight the one wordyou can do this. For targeting and things like, Enemies list or Cities you'll want to use tables.

^You rub some (\w+) on a vorpal sword\.$

selectCaptureGroup(2)
fg("red")
bg("black")
resetFormat()