The winning of heathen souls was proving to be a costly endeavor.

Despite this win, the fact remains that breeding giant pandas is a challenging and costly endeavor.

"But it's very obvious to me that this is going to be a prolonged and costly endeavor."

Might it rather be a panacea for the more costly endeavor of upgrading passenger screening?

The parochial schools do not provide special education, a costly endeavor.

In any event, naming is a costly endeavor.

A costly endeavor, that- but then, spies were in the business of being difficult to identify.

Historic restoration, they point out, is a costly endeavor, something that many elected officials failed to appreciate.

In addition, a transcontinental railroad would become a very costly endeavor.

To do so, it will have to come up with a regulatory scheme, among other costly endeavors.