I woocommerce you can create Attributes, like Color These attributes can have terms, like red, green, white. Later on, you can add these attributes to a product.
I know how to add these attributes by means of the API, like described here: http://woothemes.github.io/woocommerce-rest-api-docs/#create-a-product-attribute
I've been searching for hours, but there seems to be no way to add terms with the API. Am I missing something?