muniments
Concise Oxford English Dictionary © 2008 Oxford University Press:
muniments /ˈmjuːnɪm(ə)nts/
▶plural noun chiefly Law title deeds or other documents proving a person's title to land.
– origin ME: via OFr. from L. munimentum ‘defence’ (in med. L. ‘title deed’), from munire ‘fortify’.
'muniments' also found in these Oxford entries:

