The Proto-Basque database has been compiled by J. Bengtson. It is still under construction (currently including slightly more than 600 entries), but features most of the Basque basic lexicon. It is hierarchically linked to the Sino-Caucasian database.

Most of the field names reflect the following Basque dialects:

ARB = Araban = meridional
BZK = Bizkaian = vizcaíno
GIP = Gipuzkoan = guipuzcoano
ANV = High Navarrese = alto-navarro
BNV = Low Navarrese = bas-navarrais
SAL = Salazarese = salacenco
LAB = Lapurdian = labourdin
BZT = Baztanese = baztanés
AZK = Aezkoan = aezcoano
ZBR = Zuberoan = souletin
RNC = Roncalese = roncalés

References:

Aulestia, G., and L. White. 1992. Basque-English English-Basque Dictionary. Reno: University of Nevada Press.

Azkue, R.M. de. 1905. Diccionario vasco-español-francés. Bilbao.

Berger, H. 1956. Mittelmeerische Kulturpflanzennamen aus dem Burušaski. Münchener Studien zur Sprachwissenschaft 9: 4-33.

Berger, H. Die Burušaski-Lehnwörter in der Zigeunersprache. Indo-Iranian Journal 3.1: 17-43.

Berger, H. 1998. Die Burushaski-Sprache von Hunza und Nager. Teil III. Wörterbuch. Wiesbaden: Otto Harrassowitz.

Bouda, K. 1948. Baskisch und Kaukasisch. Zeitschrift für Phonetik 2: 182-202; 336-352.

Bouda, K. 1949. Baskisch-Kaukasische Etymologien. Heidelberg: Carl Winter.

Chirikba (čirikba), V.A. 1985. Baskskij i severokavkazskie jazyki. In: Drevnjaja Anatolija 95-105. Moscow: Nauka.

Chirikba (čirikba), V.A. 1996. Common West Caucasian. Leiden: Research Scholl CNWS.

Hualde, J.I. 1995. Comments on Larry Trask's [1995] Paper. Mother Tongue I: 115-119.

Jacobsen, W.H. 1995. Comment on R.L. Trask (1995). Mother Tongue I: 120-142.

Kuipers, A. H. 1975. A Dictionary of Proto-Circassian Roots. Lisse, Neth.

Larrasquet, J. 1939. Le Basque de la Basse-Soule orientale. Paris: C. Klincksieck.

Leizarraga, J. 1571. Jesus Christ gure jaunaren testamentu berria. Rochellan. [as cited by Michelena (1961)]

Meyer-Lübke, W. 1935. Romanisches Etymologisches Wörterbuch. Heidelberg: Carl Winter.

Michelena, L. 1961. Fonética Histórica Vasca. San Sebastián: Diputación de Guipúzcoa.

NCED = S.L. Nikolaev & S.A. Starostin. 1994. A North Caucasian Etymological Dictionary. Moscow: Asterisk.

Tovar, A. 1961. The Ancient Languages of Spain and Portugal. New York: S.F. Vanni.

Trask, R.L. 1995. Basque and Dene-Caucasian: A critique from the Basque side. Mother Tongue I: 3-82.

Trask, R.L. 1997. The History of Basque. London/New York: Routledge.

Trask, R.L. 1999. Comments on Bengtson's Basque-Caucasian Comparisons. Mother Tongue V: 71-85.

Uhlenbeck, C.C. 1940-41. Vorlateinische indogermanische Anklänge im Baskischen. Anthropos 35/36: 202ff.

Xajdakov, S.M. 1973. Sravnitel'no-sopostavitel'nyj slovar' dagestanskix jazykov. Moscow: Nauka.

Zhirkov (žirkov), L.I. 1936. Avarsko-russkij slovar'. Moscow: Gosudarstvennyj Institut "Sovetskaja enciklopedia."