Reverse Dictionary: CLANDESTINE

ADJECTIVES
1563 — CLANCULARY clandestine; secret, private; underhand → obs.
1592 — UNDERHAND clandestine; secret, surreptitious 
1610 ​— SUBREPTITIOUS clandestine, surreptitious 
1621 — CLANCULAR clandestine; secret; private; concealed → obs.
1656 — CLANCULARIOUS clandestine; secret; private; unknown; underhand → obs.
1692 — HUGGER-MUGGER secret, clandestine
..L18 — HIDLINGS clandestine; secret, hidden, underhand → Sc. & N. Eng. dial.
..19C — HUGGRY-MUGGRY clandestine; secret → Sc.
.M19 — UNDER THE BED clandestine, secret, corrupt 
..20C — SIDE clandestine; surreptitious → sl.
1928 — UNDER COVER clandestine; secret; in hiding → US criminals’ sl.
1938 — UNDER THE TABLE clandestine, secret, corrupt 

ADVERBS
1225 — HIDLINS clandestinely, secretly, stealthily → Sc.
1529 — HUGGER-MUGGER secretly, clandestinely
1581 — UNDERBOARD clandestinely, in an underhand or secret manner; not openly or honestly; opposed to ‘aboveboard’ → obs.
1940 — UNDER THE LAP clandestinely → Aust. sl.

NOUNS
1597 — HIDLINGS clandestine or secret operations → Sc. & Eng. dial.
..19C — HUGGRY-MUGGRY clandestine conduct → Sc.
1960 — CREEP a clandestine meeting or mission → African-American sl.

VERBS
1785 — TEET to peep or pry in a clandestine manner → Sc.