| covertly(adverb, show, quietly, secretly, personally) |
| secretly(adverb, show, clandestine, slyly, underhandedly) |
| clandestinely(adverb, show, clandestine, quietly, secretly) |
| covert(adjective, show, clandestine, underhanded) |
| privately(adverb, clandestine, quietly, secretly, personally) |
| confidentially(adverb, quietly, secretly, personally, privately) |
| furtively(adverb, clandestine, quietly, secretly, personally) |
| in secret(expression, adverb, quietly, secretly, personally) |
| surreptitiously(adverb, clandestine, quietly, secretly, personally) |
| undercover(adjective, show, secret, clandestine, underground) |
| by stealth(expression, idiom, adverb, show, clandestine) |
| huggermugger(adjective, adverb, show) |
| in camera(expression, clandestine, quietly, personally, privately) |
| on the sly(idiom, adverb, show, clandestine, quietly) |
| private |
| secret(adjective, show) |
| stealthily(adverb, clandestine, quietly, secretly, personally) |
| veiled(adjective, secret, clandestine, underground, underhanded) |
| clandestine(adjective, show, secret, underground, secretly) |
| hush-hush(adjective, show, informal, clandestine, quietly) |