= [
"g" => "g",
"kg" => "kg",
"ustons" => "ustons",
"metrictons" => "metrictons",
"imperialtons" => "imperialtons",
"gram" => "g",
"grams" => "g",
"kilogram" => "kg",
"kilograms" => "kg",
"kilo" => "kg",
"kilos" => "kg",
"ounce" => "ounces",
"ounces" => "ounces",
"pound" => "pounds",
"pounds" => "pounds",
"stone" => "stones",
"stones" => "stones",
"hundredweight" => "hundredweights",
"hundredweights" => "hundredweights",
"us ton" => "ustons",
"us tons" => "ustons",
"metric ton" => "metrictons",
"metric tons" => "metrictons",
"imperial ton" => "imperialtons",
"imperial tons" => "imperialtons",
]