The proposed dictionary is unique because it combines a dictionary of synonyms, a dictionary of antonyms and a dictionary of homonyms. Using the dictionary, younger students will expand their vocabulary, improve the culture of oral and written speech, learn to use the right words correctly and to the place. The dictionary gives the correct spelling and interpretation of synonyms, antonyms and homonyms, emphasizing the shades and differences of their meanings. The selection of words for the dictionary and its volume are determined by the State Standard for the Content of Education for Primary School in Russian and Literary Reading. The proposed dictionary will be a good assistant for younger students in the classroom, as well as at home while preparing homework.