Synonym determination method, computer-readable recording medium having synonym determination program recorded therein, and synonym determination device

A non-transitory computer-readable recording medium having a synonym determination program recorded therein, causing a CPU to use memory and execute the steps of:

• converting words contained in a document into first vectors representing meanings of the words;
• obtaining a word similarity on the basis of the first vectors;
• converting sentences contained in the document into second vectors representing meanings of the sentences;
• obtaining a sentence similarity on the basis of the second vectors;
• classifying the words contained in the document according to topic;
• and
• determining whether the words contained in the document are synonyms on the basis of the word similarity, the sentence similarity, and the result of topic classification.

A synonym determination device comprising:

• a word/vector conversion portion configured to convert words contained in a document into first vectors representing meanings of the words;
• a word similarity calculation portion configured to obtain a word similarity on the basis of the first vectors;
• a sentence/vector conversion portion configured to convert sentences contained in the document into second vectors representing meanings of the sentences;
• a sentence similarity calculation portion configured to obtain a sentence similarity on the basis of the second vectors;
• a topic classification portion configured to classify the words contained in the document according to topic;
• and
• a determination portion configured to determine whether the words contained in the document are synonyms on the basis of the word similarity, the sentence similarity, and the result of topic classification.