Various texts related to education policy and education research have recently started using two conjugate concepts "competency" and "competence". These terms are sometimes treated as synonyms of a single concept; however, in other cases they are separated and used as two terms of different educational concepts. English also has some confusion over the terms "competency" and "competence". They are presented and discussed differently in different resources, i.e. in some cases their meanings correspond but in other cases they differ. All this unnecessary confusion indicates the necessity of concept harmonisation. The analysis of the features of the Lithuanian concepts and their comparison with the English equivalents has shown no objective reasons to use both concepts. These reasons are revealed when discussing the whole microsystem of the concept "competence". The microsystem involves such concepts and terms as "competence", "skill", "aptitude", "ability", "knowledge", "understanding", and "automatic skill". The authors of the article suggest to stop using the English term "competency" and the Lithuanian "kompetencija" as they do not have a clear place in the system of concepts, are synonymously used together with other terms to name already existing concepts or sometimes even do not signify any concept at all. This would prevent from both subject field and translation related confusion. (Contains 15 footnotes.)