Thesaurus.com
Dictionary.com
Definitions

hole-and-corner

[hohl-uhn-kawr-ner] / ˈhoʊl ənˈkɔr nər /
ADJECTIVE
surreptitious
Synonyms
STRONGEST
clandestine covert furtive hush-hush unauthorized
WEAK
fraudulent hidden on the Q.T. on the sly private skulking slinking sly sneaking stealthy sub-rosa under wraps under-the-table undercover underhand veiled
Antonyms
STRONGEST
aboveboard forthright honest open public truthful
WEAK
authorized
ADJECTIVE
undercover
Synonyms
STRONGEST
covert
WEAK
clandestine concealed confidential creep furtive hidden hush-hush incognito intelligence on the Q.T. private stealth stealthy sub-rosa surreptitious under wraps underground underhand underneath
Antonyms
WEAK
known open public

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.