oak

Which Means:

Any tree or shrub which have glove-like leaves and a nut called an acorn, a favorite of squirrels.

As In:

For their science project, they had to collect many kinds of leaves, one of which was oak.

Heads Up!

OA has a long O sound as in 'oak.' The A is silent. Other words that have OA are 'groan' and 'loaf.'