Saṃsāra vs Saṃskāra

Saṃsāra (cycle of birth and death) and Saṃskāra (mental formations) seem to be semantically close to one another in the sense that Saṃskāra in the form of unwholesome seeds and habit energies would feed into the endless cycle of Saṃsāra and keep it going. Given the uncanny phonetic similarity between these two terms, I was just wondering if they are indeed etymologically related and how this conception of present inclinations being dictated by past experiences fit into Buddhist philosophy as a whole.