Primity is a word that is not frequently used in everyday language, and hence, it can be challenging to find synonyms for it. However, some words that come close to its meaning are "primordial," "earliest," "primitive," "prehistoric," "archaic," and "ancient." These words all indicate a time long before modern civilization and hint at the beginning of things. They imply the earliest stages of existence or development, and hence, they can be used interchangeably with primity. So, the next time you want to express the idea of something or someone being ancient or having primitive qualities, consider using one of these words instead of primity.