The article dwells on the issue concerned word-building potential and morphological peculiarities of the suffix -ča in modern Tajik literary language on the example of “A Brief Word-Building Dictionary of Tajik Literary Language” (1983) [4] “Ghulomon” by S. Aini (2019) [1]. These works are considered to be one of the priceless and fundamental sources contained a numerous literary facts and evidences belonging to modern Tajik literary language. It is concluded that the relevant word-building element is considered to be one of productive ones contributed into new nouns derivation.