Reverse Dictionary: REVEAL

ADJECTIVES
1475 — PRODITORIOUS treacherous, traitorous, perfidious; apt to betray or reveal what is hidden or in the mind; apt to disclose or make known → obs.

NOUNS
1386 — BEWRAYING the act of revealing or exposing → obs.
1643 — TWITTING a revealing something by indiscreet talk; a blabbing → obs.
1653 — UNBOWELLING disclosure; revelation → obs.
1882 — GIVE-AWAY something that gives one away; also, an inadvertent revelation of the facts → sl., orig. US
1970 — PIF the ‘real’ truth, what is essential as opposed to the apparent; a revelation or ‘epiphany’ → US students’ sl. (Bk.)

NOUNS, PERSON
1440 — BEWRAYER he who reveals → arch.
1557 — BLABBER one who reveals all
1928 — EYE-OPENER a person who reveals facts or clarifies a matter to others
1936 — BLABBERMOUTH one who reveals all → sl., orig. US

VERBS
.. 900 — OPEN to lay bare or make manifest to the view; to reveal, to disclose, to declare, to make known → obs.
1300 — BEWRAY to expose a person by divulging his secrets, or telling something that one knows to his discredit or harm; hence, to expose or reveal the unknown doer of an act → obs.
1300 — NAKEN to reveal or disclose → obs.
1300 — UNCLOSE to disclose, to make known, to reveal
1330 — MYTH to show, to reveal, to demonstrate → obs. chiefly Sc.
1382 — AGAIN-COVER to reveal, to uncover → obs.
1400 — ACCUSE to betray, to disclose; hence, to reveal, to display, to show or make known
1400 — BETRAISE — BETRAISH to reveal, to disclose incidentally → obs.
1514 — REVELATE to reveal → obs.
1529 — DECIPHER of actions, outward signs, etc.: to reveal, to make known, to indicate → obs.
1533 — PATEFY to reveal, show, declare, disclose; to make open or manifest → obs.
1563 — LAY TO SIGHT to reveal, to disclose → obs.
1575 — BLOW to speak revealingly; to give away secret information
1583 — BLAB to speak revealingly
1588 — UNBOSOM to disclose, to reveal
1607 — UNBRACE to lay open; to disclose, to reveal
1613 — PALESATE to manifest, to reveal → obs.
1643 — TWIT to reveal something by indiscreet talk; to spread gossip or rumour → obs. exc. Eng. dial.
1650 — UNBOWEL to display or reveal → obs.
1659 — UNCLOAK to expose, to lay bare, to reveal
1660 — DECORTICATE to divest of what conceals, to expose, to disclose, to reveal
1698 — CACKLE to confess and/or to inform on others; to reveal secrets through indiscreet talk; to blab → US & UK criminals’ sl.
1793 — TELL THE TRUTH AND SHAME THE DEVIL to boldly tell the truth in defiance of temptation to the contrary; to reveal all at any cost
1812 — BLOW THE GAFF to let out a secret; to reveal a plot; to give convicting evidence → sl.
1821 — SHOW UP to expose or reveal someone; to make another person seem inefficient, ridiculous or inferior → Amer. colloq.
1834 — EFFLORESCE to come to the surface, to become manifest; to be disclosed or revealed
.M19 — BAWL OUT to announce oneself; to reveal something → sl., orig. US
1855 — SPIT IT OUT — SPIT OUT  to openly state or reveal something → sl.
1864 — SHOOT OFF ONE’S MOUTH to speak revealingly → sl., orig. US
1872 — AIR DIRTY LAUNDRY to reveal or discuss private matters, esp. of a scandalous or controversial nature
1872 — AIR ONE’S DIRTY LINEN — AIR ONE’S LINEN to reveal or discuss private matters, esp. of a scandalous or controversial nature → colloq.
1895 — OPEN TO to tell, to reveal → Eng. dial.
1901 — COUGH to speak revealingly; to confess → sl., orig. US 
1903 — CHEEP to tell or reveal; to betray a secret; to mention, to hint at → Amer. dial.
1905 — OPEN OUT to reveal one’s true character → Eng. dial. (Bk.)
1905 — UPPEN to mention, to reveal, to disclose → Eng. dial. obs. (Bk.)
1910 — BLOW OFF ONE’S MOUTH — BLOW OFF ONE’S TRAP — BLOW OFF ONE’S YAP to talk too much; to reveal a secret → US sl., arch.
1917 — SPILL to speak revealingly → sl., orig. US
1917 — TIP ONE’S HAND to reveal one’s plans, true feelings, etc., often unintentionally
1919 — SPILL THE BEANS to speak revealingly → sl., orig. US
1920 — GIVE SOMEONE THE WORKS to reveal everything → sl.
1920 — TELL THE WORKS to reveal everything → sl.
1922 — SHOOT THE WORKS to tell the truth; to reveal all → US sl.
1924 — TALK to speak revealingly → sl.
1928 — BLOW THE LID OFF to expose to public view, esp. to reveal something scandalous, illegal, etc. → colloq.
1946 — PERCEPT to make perceptible or distinct; to reveal
1975 — BLAB OFF to reveal a secret; to say what  is better left unsaid → US sl. (Bk.)
1988 — AIR ONE’S DIRTY LINEN IN PUBLIC to talk about private quarrels or disgraces where others can hear; to make public something embarrassing that should be kept secret
2006 — PUT SOMEONE ON FRONT STREET to expose someone’s secrets in public → African-American sl.