More than half of black South Africans live in the countryside and form a potentially formidable constituency once blacks get the vote.

Whether or not those changes were spawned by the debut in June of a potentially formidable competitor called Travelweb (www.travelweb.com), the traveler benefits.

This created a personal union between the two countries and a potentially formidable opponent for the Teutonic Knights.

In Hollywood, though, Mr. Penn is considered a potentially formidable film maker, with a powerful visual talent, regardless of what critics say.

Even if Microsoft does not become a network carrier, it presents a potentially formidable challenge to the regional phone companies.

The sheer size of the school system makes his a potentially formidable constituency.

Certainly, the loss of a potentially formidable king was a blow to the kingdom.

He is considered a potentially formidable mayoral candidate, but because he has never run for election before, he is still untested.

The meticulous preparations indicated a potentially formidable adversary was expected, an adversary with devastating firepower of their own.

But even with the potentially formidable competition, many analysts feel it is still too early to nail the lid on Netcom's coffin.