To designate belonging in Russian, there is a special construction with the verb "есть". This construction corresponds to I have in English, Ich habe in German, J'ai in French, etc.
There are many synonyms in Russian language. But this is not entirely true, because there are no completely identical words in meaning - words differ in style, meaning, and usages.
There are also words that are similar in meaning and usage, but they have completely different meanings.