tenter

A framework on which fabric can be held taut for drying or other treatment during manufacture. (Oxford American Dictionary)

tenterhook: a hook used to fasten cloth on a drying frame or tenter.

on tenterhooks: in a state of suspense or agitation because of uncertainty about a future event.

suzerainty

A state that has some control over another state that is internally autonomous.

callow

Inexperienced and immature.

vexillology

The study of flags.

See the Flags of the World web site for lots of information about flags.

The site has a collection of SVG images of flags.