The aim of this work is the description of suffix sets distinguished in the course of the word formation analysis of noun derivatives. In 1073 suffix sets, those in which a suffix is a separate formant (not a co-formant) are prevailing. Among those, dual-suffix sets are predominant; three-element sets are far less frequent. The longest sets consist of five suffixes, distributed within 5 or 7 times, with 2 cuts of non-inflectional elements (usually formants added earlier). Apparently, the richer the suffix set, the lower is its frequency and the more important is the role of cuts which manifests in the reduction of set length and, consequently, of derivatives.