As adjectives the difference between secretive and subterranean
is that secretive is having an inclination to secrecy while subterranean is below ground, under the earth, underground.
secretive
English
Synonyms
* furtive
* sly
* See also
subterranean
English
Adjective
(
en adjective)
below ground, under the earth, underground
Synonyms
* subterraneous, subterrene, underground
Related terms
* terranean