hole-and-corner vs hush-hush

hole-and-corner and hush-hush both are adjectives.

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

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

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

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

hole-and-corner (adjective)	hush-hush (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