inselberg
Concise Oxford English Dictionary © 2008 Oxford University Press:
inselberg /ˈɪns(ə)lbəːg, -z-/
▶nounGeology an isolated hill rising abruptly from a plain.
– origin early 20th cent.: from Ger., from Insel ‘island’ + Berg ‘mountain’.
'inselberg' also found in these Oxford entries:

