I am Romanian. The equivalent of the word "comrade" is "tovarăș" (loan from the Russian "товарищ"). The word is very much still in use, but the meaning of it switched to a more informal version of "friend". For example, "ies afară cu tovarașii" is a very common way of saying "I'm going out with my friends". Funnily enough, it's never used in a formal context, as it was used during the communist period.