Back-formation is a word-formation method whereby a new lexeme results from the removal of an affix, usually a suffix. While back-formation is characteristic of English, where it is an economical synthetic means of creating new lexemes, it need not to be typical of other languages. For this reason, analysis of the lexicographic treatment of back-formations in bilingual dictionaries can reveal important cross-linguistic differences. The present study shows that back-formations are often neglected and undertreated in English-Estonian bilingual dictionaries. At the same time, it is possible to establish the range of possible translation equivalents, which in most cases are multi-word combinations. It is argued that inclusion of the established translation equivalents will contribute to the lexical enrichment of bilingual dictionaries.