The Latvian word "pieder" means "belong". There are several synonyms that can be used instead of "pieder", depending on the context and meaning of the sentence. These include "ietilpt" (to fit in), "būt" (to be), "atrodas" (to be located), "savienot" (to connect), and "saistīt" (to tie). Other synonyms include "sastāvēt" (to consist of), "pārņemt" (to take over), "vadīt" (to lead), and "kazinošs" (to possess). It's important to choose the correct synonym for the context to ensure clarity and coherence in your sentences.