hole-and-corner vs clandestine

hole-and-corner and clandestine both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hole-and-corner	No	Yes	No	No
clandestine	No	Yes	No	No

As adjectives, hole-and-corner and clandestine are synonyms defined as:

hole-and-corner and clandestine: conducted with or marked by hidden aims or methods

Other synonyms of hole-and-corner include cloak-and-dagger, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground.

hole-and-corner (adjective)	clandestine (adjective)
conducted with or marked by hidden aims or methods	conducted with or marked by hidden aims or methods
relating to the peripheral and unimportant aspects of life