The grammatical phenomenon of transforming a grammatical form into a new topic, as arepresentative form of speech or as a topic within a paradigm, we will call grammatical thematization. Thisphenomenon has been quite widespread in the historical development of the morphological structure ofAlbanian language. It is spread throughout the morphological system of variable parts of speech.Thematizations of grammatical forms are new linguistic states obtained for psychological, social, and linguisticreasons. In the noun system, the most numerous and obvious cases of thematization of grammatical forms areobserved in the grammatical category of number. The most common process has been to use many grammaticalplural forms as singular. These conversions from the plural form to the singular are generally calledsingularized plurals. Due to the occurrence of this phenomenon in different periods - often even in very oldperiods - they have completely replaced the singular and formed a new plural. The thematization ofgrammatical forms should not only be ascertained but should also be followed historically. However, the paperdeals with special issues that can serve as a starting point for further studies and in-depth studies.