“Eminent domain” is the power of the federal, state, or local governments (and, in some limited circumstances, private parties, such as utilities and railroads) to take, or to authorize the taking of, private property for a public use without the owner’s consent and upon payment of just compensation.
A power of appointment is the power given to someone to allow that person to designate who will receive property or an interest in property. The creator of the power is called the donor, the individual having the power is the powerholder, and the possible recipients of the property are permissible appointees. There are other potential ramifications for powers of appointment that should be taken into account. All in all, whether to use a power of appointment and, if so, with what characteristics, are questions best answered with the advice of a lawyer well versed in estate planning.