Each CIA cryptonym in these documents contains a two character prefix called a digraph, which designates a geographical or functional area. The rest is either an arbitrary dictionary word, or occasionally the digraph and the cryptonym combine to form a dictionary word (ie - AEROPLANE).
Partial List of Digraphs and Probable Definitions
AM, AV, CA, DT, EC, ES, FJ, HB, HO, HT, JM, JU, KM, LC, LI, PB, SE, SC, WS, ZR
Partial List of CIA Cryptonyms and Probable Definitions
AEBARMAN, AEFOX, AEFOXTROT, AELADLE, AEROPLANE, AMLASH, AVBLIMP, AVBRANDY, AVBUSY, CABOUNCE, DTFROGS, ECJOB, ESMERALDITE, FJDEFLECT, HBDRILL, HOPEFUL, JMBLUG, JUBATE, JUBILIST, KMFLUSH, KUCAGE, KUDESK, KUHOOK, KUJUMP, KUPALM, KUTUBE, LCPANES, LICOZY, LITEMPO, ODIBEX, PBCABOOSE, PBFORTUNE, PBSUCCESS, SECANT, SEQUIN, SCRANGER, WSBURNT, WSHOOFS, and ZRBRIEF
(cf: Cullather and PBSUCCESS document collection at http://www.foia.ucia.gov/popdoc1/guatemala.htm; Leo D. Carl, The International Dictionary of Intelligence, Mavin Books, 1990, p. 107; Phillip Agee, Inside the Company: CIA Diary, Stonehill Publishing, 1975, p. 48; David Wise, Molehunt, Random House, 1992, p.19)