Making a list of words that I’ve observed replace the visarga with र् even when normally it’d become ओऽ- before a voiced sound (as far as I’m aware) and a source for where I’ve seen it (my best guess as to why this is is that because these words were originally रेफांत and grammarians wanted to preserve that in sandhi)
प्रातः (shloka 19 of the Kanakadhara Stotra (link to an english youtube video breaking the shloka down) (I also remember something like प्रातर्नमामि हृदयेश्वरीं भजे but I cant remember where I heard it but it’s stuck in my head)
पुनः (पुनर्जन्म which I’d say is a pretty common term thrown around)
अंतः (अंतर्मन अंतर्यामी actually my phone’s hindi dictionary has an entry for अंतर्)










