This list draws on the North American examples found in Wiktionary.
Sky:
yáá - Apache
hayumu - Arawak
galvloi - Cherokee
shotik - Chickasaw
tomoobi - Comanche
kaj - K’iche’
musikisq - Malecite-Passamaquoddy
ilhuicatl - Nahuatl
yá - Navajo
giizhig - Ojibwe
ilhuicac - Pipil
auanda - Purepecha
ŦI¸ŦEȽ - Saanich
p’ȍpə́na - Taos
vinajel - Tzotzil
mush-hàkw - Unami Lenape
ka’an - Yucatec Mayan
River:
c’ena’ - Ahtna
iswa - Catawba
uweya, amayi - Cherokee
abookoshi - Chickasaw
pia hunuubi - Comanche
sîpi - Cree
deh - Dogrib
kuuk - Greenlandic, Inuktitut, Inupiaq
stó:lō - Halkomelem
ʔahqʰa - Kashaya (cf. Latin aqua)
ɢoɢe - Klamath-Modoc
stúləkʷ - Lushootseed
ātōyātl - Nahuatl
pamptuckquah’ - Nanticoke
tooh nílíní - Navajo
joke - Nottoway-Meherrin (no joke) (cf. Finnish joki)
ziibi - Ojibwe
yeokanta - Powhatan
STO,LU, - Saanich
thiːpi - Shawnee
héen - Tlingit
taksitai - Tutelo
sipu - Unami Lenape