6. The method of claim 5 , wherein calculating probability values for the plurality of other terms in the subset hierarchical tree includes: calculating, by the computer system, on a per-node basis, a probability value for a given node in the subset hierarchical tree based on probability values of immediate child nodes to the given node using a specified scoring function.
5. The method of claim 3 , wherein the subset hierarchical tree is a subset of the lexical database including a hyponym node associated with the first term, a subset of the plurality hyponym nodes associated with other hyponym terms that share the common parent with the first term, and a subset of the plurality of hypernym nodes associated with hypernym terms within the hierarchy between the subset of the plurality of hyponym nodes and the root node.