source: http://www.zompist.com/indianwd.html
Native American loan words:
abalone - Costanoan aulun
achiote - Nahuatl achiotl
agouti - Guarani acut
alpaca - Quechua allpaka
annatto - Caribbean
anorak - Eskimo norq
atlatl - Nahuatl atlatl 'spear-thrower'
avocado - Nahuatl ahuacatl
axolotl - Nahuatl atl 'water' + xolotl 'spirit'
barbecue - Carib barbricot
bayou - Choctaw bayuk
cacique - Arawak kassequa 'chief'
cacomistle - Nahuatl tlacomiztli
caiman - Carib acayuman
cannibal - Tupi caryba 'superior man'
canoe - Caribbean
capybara - Tupi
caribou - Algonquian
carnauba [wax] - Tupi
cassava - Taino cabi
cashew - Tupi acaj
caucho, Fr. caoutchouc - Quechua kawchu
caucus - Algonquian caucauasu 'counselor'
cavy - Galibi cabiai, or perhaps Quechua qowi
cayenne - Tupi kyinha
chocolate - Aztec xocolatl
chayote - Nahuatl chayotli
cherimoya - Quechua chirimuya
chigger - Cariban chigo
chile, chili - Nahuatl chilli
chinchilla - Aymara chinchilla
chipmunk - Algonquian chitmunk
chunkey [game] - Catawba chenco
cigar - Maya sik'ar 'smoke'
coati - Tupi coat
coca - Quechua kuka
cocoa, cacao - Nahuatl cacahuatl (Note: French cacahute is from Nahuatl tlacucahuatl)
coho [salmon] - Salish
condor - Quechua kuntur
copal - Nahuatl copalli 'resin'
cougar - Tupi suasuarana 'like a deer'
coyote - Nahuatl cyotl
coypu - Araucanian kypu
curare - Cariban kurari
dory - Miskito dri
enchilada - ultimately from chile
Great Spirit - loan translation of Ojibwa kitchi manitou
grouper [fish] - Ge-Pano-Carib?
guacamole - Nahuatl ahuaca-molli 'avocado sauce'
guano - Quechua wanu
guacharo - Quechua wachu
guarana - Tupi guaran
gaucho - Quechua wakcha 'poor person'
guava - Caribbean
guanaco - Quechua wanaku
hammock - Taino
high muckamuck - Chinook hiu muckamuck
hickory - Algonquian pawcohiccora
hoatzin - Nahuatl uatzin
hogan - Navajo hogan
hominy - Algonquian
how [greeting] - Dakota ho, Omaha hau
hurricane - Carib huracan 'his one leg' - the name of a god
husky [dog] - corruption of 'Eskimo', ultimately Algonquian
igloo - Eskimo iglu
iguana - Arawak iwana
Inca - Quechua inka
ipecac - Tupi ipe-kaa-gune 'medicinal plant'
jacana - Tupi-Guarani jasan
jackaranda - Tupi yacarand
jaguar - Guarani jagu
jerky - Quechua ch'arki
jicama - Nahuatl xicamatl
kachina - Hopi qacina
kayak - Eskimo qajaq
kiva - Hopi
lagniappe - Quechua yapay 'add, addition'
lima [bean] - Quechua rimay 'speak' (Lima, the city,is named after the river Rimaq, i.e 'Speaking')
llama - Quechua llama
macaw - Tupi macahuba
maguey - Taino
mahogany - of unknown origin, but the tree is Caribbean...
maize - Carib mahiz
malamute - Eskimo Mahlemut ethnonym
mangrove - Taino mangle
manioc - Tupi mandioca
maraca - Tupi
mat - Quechua mati
mescal - Nahuatl mexcalli
mesquite - Nahuatl mizquitl
moccasin - Natick mohkussin
mole - Nahuatl -molli 'sauce'
moose - Natick moos
mugwump - Natick mugquomp 'captain'
mukluk - Eskimo muklok 'large seal'
muktuk - Eskimo maktak
muskrat - Natick musquash + 'rat'
ocelot - Nahuatl ocelotl
opossum - Powhatan aposoum
papaya - Carib
paca - Tupi pca
pampa - Quechua pampa 'flat'
papoose - Algonquian papoos
parka - Aleut parka 'skin' (< Russian < Samoyed!)
pawpaw - Carib (same source as papaya)
pecan - Algonquian paccan
peccary - Carib pakira
pekan - Abnaki pkan
pemmican - Cree pimikn
persimmon - Cree pasiminan 'dried fruit'
petunia - Tupi petyn
peyote - Nahuatl peyotl
piranha - Tupi pirtsainha
pirogue - Carib
poncho - Araucanian pontho
pone - Algonquian pn
potato - Taino batata
potlatch - Nootka patshatl
powwow - Algonquian
pulque - Nahuatl poliuhqui 'spoiled'
puma - Quechua puma
pung [work sled] - Algonquian tom-pong
quahog - Narraganset poquahock
quetzal - Nahuatl quetzall
quipu - Quechua khipu 'knot'
quinoa - Quechua kinwa
quinine - Quechua kinakina
raccoon - Algonquian arathkone
sachem - Narraganset schim
saguaro - Pima
samp - Narraganset nasump
sapodilla - Nahuatl tzapotl
sasquatch - Halkomelem sesqec
savannah - Taino zabana
seapoose [riptide] - Munsee sepos
scuppernong - Algonquian (from a river name)
shack - Nahuatl xacalli 'thatched cabin'
shark - Maya xoc
skunk - Massachuset squnck
squash - Massachuset asko:tasquash
squaw - Massachuset squa
sockeye [salmon] - Salish sukkegh, or Northern Straits Salish seqey'
sofkee - Muskogean safki
succotash - Narraganset msckquatash
tamale - Nahuatl tamalli
tamandua - Tupi tamandu 'ant-catcher'
tamarack - Algonquian
tamarin [monkey] - Galibi
tanager - Tupi at 'walk' + car 'around'
Tanis - Cree 'little daughter'
tapioca - Tupi tipioca 'residue'
tapir - Guarani tapiira
teocalli - Nahuatl teocalli
teosinte - Nahuatl teocentli
tepee - Dakota thipi
terrapin - Algonquian *toolepeiwa
tinamou - Galibi tinamu
tobacco - Arawak tzibatl
tomahawk - Algonquian tamahaac
toboggan - Micmac toba:kan
totem - Ojibwa ninto:te:m
tomato - Nahuatl tomatl
tonka [bean] - Galibi
toucan - Tupi tucana
umiak - Eskimo
vicua - Quechua wik'ua
wampum - Algonquian wampumpeage
wapiti - Shawnee wapiti 'white rump'
wickiup - Fox wikiyapi
wigwam - Abnaki wikewam
Winona - Dakota Winu~n
woodchuck - Algonquian otchek
yautia - Taino
yucca - Arawak