X is a hyponym of Y if there exists an is-a relationship between X and Y.
That is, if X is a subtype of Y.
Or, for example, if X is a species of the genus Y.
X is a hypernym of Y is Y is a hyponym of X.
Holds between: nouns and nouns & verbs and verbs
Examples:

• artifact is a hyponym of object
• object is a hypernym of artifact
• carrot is a hyponym of herb
• herb is a hypernym of carrot

getHypernyms(id);
getHypernyms(word, posStr);