A is for (whoever gets Z starts the next theme)

[twyngwyn]

Grows on a tree

A is for Almond

[purple_haize]

T is for Type / Trait

[twyngwyn]

U is for Ultra / Uber

[crosbystills]

V is for Vertical / Upright

[purple_haize]

W is for Wail /Wallow

[electric*mayhem*band]

X is for Xylose / Sweetener

[twyngwyn]

Y is for Yield / Cede

[electric*mayhem*band]

Z is for Zero / Nil.

Next theme: Antonyms. Opposite word meanings.

A is for Angry / Placid.

[twyngwyn]

B is for Beautiful / Ugly

[purple_haize]

C is for Cute / Horrible

[electric*mayhem*band]

D is for Dangerous / Safe.