zad (noun): a large, broad winged, black-and-white bird with a long, narrow, yellowish, hooked beak, found in the Tahari; they scavenge on carrion; similar to the Earth vulture (Book 10:  Tribesmen of Gor, page 232)

zad, jungle (noun): a less aggressive cousin of the Tahari zad; small, yellow-winged, scavenging birds with long yellowish, slightly curved beaks; found in the rain forest inland of Schendi 
(Book 13:  Explorers of Gor, page 415)

zadit (noun): a small, tawny feathered, sharp billed bird of the Tahari; insectivorous, feeding on sand flies and other similar insects; they often land a kaiila and spend long periods hunting the sand flies that infest the host animal  (Book 10:  Tribesmen of Gor, page 152)

Zar (noun): a board game of the Tahari; the board is marked like a Kaissa board, but the pieces - nine per player, and called ‘pebbles’ - are placed at the intersections of the lines; movement is somewhat like that of checkers, but without capturing of pieces; the object of the game is to effect a complete exchange of the original placement of the pieces.  (Book 10:  Tribesman of Gor, page 265)

zarlit (noun): large, harmless, purple insect about two feet long with four long, translucent wings, with a span of about a yard. It is able to walk on top of water because of its pad like feet and feeds on small insects.  (Book 6:  Raiders of Gor, page 5; Book 24:  Vagabonds of Gor, page 160)

zeder (noun): a small, sleen-like, carnivorous mammal which inhabits the rain forests inland of Schendi, especially along the Ua River and her tributaries; grows to about two-feet and weighs 8-10 pounds; is diurnal, can swim very well and builds a stick-and-mud nest in the branches of a tree overlooking the water, where it spends the night (Book 13:  Explorers of Gor, page 312)

Zever (noun): a minor tribe of the Tahari; they are a vassal tribe of the Aretai  (Book 10:  Tribesmen of Gor, page 343)

zills (noun): finger cymbals  (Book 13:  Explorers of Gor, page 21)
1