Adjective : a challenge grant.    From Dictionary.com. 

Verb (used with object) : to challenge the wisdom of a procedure. ,a matter which challenges attention.    From Dictionary.com. 

Noun : Space exploration offers a challenge to humankind. ,a challenge to the treasurer to itemize expenditures.    From Dictionary.com. 

University College Union (UCU) branch secretary Dr Trevor Curnow said the university staff cost figures were "challengeable".    From Wordnik.com.  [News round-up] Reference

The WTO is certainly challengeable in a host of areas.    From Wordnik.com.  [CNN Transcript Sep 1, 2004] Reference

And she comes without an iota of challengeable baggage.    From Wordnik.com.  [9/11 Truth Calling Oprah!] Reference

But at least then earmarks would be challengeable on the floor.    From Wordnik.com.  [The GOP and Earmarks] Reference

Headless Chicken wrote ... well, a whole bunch, most of it challengeable.    From Wordnik.com.  [On Thursday, the Legg report will be published along with...] Reference

The procedures followed so far were challengeable in a court of law, he said.    From Wordnik.com.  [ANC Daily News Briefing] Reference

Truly, it was challengeable to organize all the staff, but a good lesson for us.    From Wordnik.com.  [My summary of the year] Reference

If that statement is challengeable, what he says next can be taken as normal and even helpful.    From Wordnik.com.  [US Must Act To Save World From Further Destruction] Reference

The lesson was that Mao's authority was un challengeable even though he was clearly in the wrong.    From Wordnik.com.  [WILD SWANS THREE DAUGHTERS OF CHINA]

Good work, but with some challengeable content; your effort and passion really shows on your site.    From Wordnik.com.  [Think Progress » Pentagon Response to Katrina Based on Nonexistent “Dodged a Bullet” Headline] Reference

If it's an illegal act, I don't see that it should necessarily be something that would be challengeable.    From Wordnik.com.  [CNN Transcript Jul 11, 2006] Reference

He said the second challengeable perspective was that for black business to survive the workers had to suffer.    From Wordnik.com.  [ANC Daily News Briefing] Reference

They were more powerful and less constitutionally challengeable than the Civil Rights legislation that has been enacted since the 1960s.    From Wordnik.com.  [The Volokh Conspiracy » Is “The Constitution in Exile” A Myth?:] Reference

"It was clear that ... in its totality, it challenged civilian control, which is a fundamental principle for us that is not challengeable.".    From Wordnik.com.  [Obama says he is 'confident' in war leadership] Reference

And, on the whole, we converse, and are challengeable.    From Wordnik.com.  [Slugger O'Toole] Reference

"This is not challengeable by the defendant," McCarty said.    From Wordnik.com.  [Local News from Spartanburg Herald Journal] Reference

"A wide margin implies less risk of a challengeable result,".    From Wordnik.com.  [Bloomberg] Reference

I see several challengeable statements in just this little sound bite article.    From Wordnik.com.  [NewWest.Net All Headlines] Reference

The guys on the field didn't seem to think it was a challengeable play, so we didn't.    From Wordnik.com.  [The Seattle Times] Reference

"They are admitting their position is at least in question and at least challengeable,".    From Wordnik.com.  [JSOnline.com] Reference

Unfortunately for us, DPI - defensive pass interference -- is not a challengeable call.    From Wordnik.com.  [Colts.com Football News] Reference

"The question still has to be determined of what is challengeable from a legal perspective,".    From Wordnik.com.  [KSAT.com - Local News] Reference

In an interview with Al-Ahram on August 12, the pontiff insisted that Mubarak was un-challengeable.    From Wordnik.com. Reference

Since the game, I found out it was a potentially challengeable play; we didn't deem it to be one.    From Wordnik.com.  [The Seattle Times] Reference

"Closing those gaps would create a level of certainty that is far less challengeable," said Dr Kennel.    From Wordnik.com.  [RealClimate] Reference

He said his group's lawyers will examine the new plan and "challenge what we believe is challengeable.".    From Wordnik.com.  [Crain's New York Business - Breaking News Feeds] Reference

So there it is - the not so shadowy pal of the "real" un-challengeable government of the Federal Reserve.    From Wordnik.com.  [Latest Articles] Reference

By using what supporters say in football stadiums as evidence of collective racism is highly challengeable.    From Wordnik.com.  [The Jakarta Post Breaking News] Reference

In its totality, it challenged civilian control, which is a fundamental principle for us that is not challengeable.    From Wordnik.com.  [NYT > Home Page] Reference

It was close enough to do so, but the whole issue is moot, because that's a judgment issue and is non-challengeable.    From Wordnik.com.  [Colts.com Football News] Reference

At bottom, Fish assumes that questions of value are utterly distinct from questions of fact-a highly challengeable position.    From Wordnik.com.  [City Journal] Reference

Interestingly for that Political Administration any verdict is not challengeable even in Supreme and High Courts of Pakistan.    From Wordnik.com.  [Countercurrents.org] Reference

"There are elements in that legislation that are challengeable in court," said Patrick Coppens, secretary general of EBF and ERNA.    From Wordnik.com.  [NutraIngredients RSS] Reference

But that's no excuse.), I will cite only three facts that will hopefully not fall into the challengeable column.    From Wordnik.com.  [All is "Lost"] Reference

Even that may be challengeable, however.    From Wordnik.com.  [CNN Transcript Mar 10, 2007] Reference

Because it's not challengeable according toyou, the agreement itself. ".    From Wordnik.com.  [Law.com - Newswire] Reference

But I think that's challengeable too.    From Wordnik.com.  [SeekingAlpha.com: Home Page] Reference

28. challengeable.    From Wordnik.com.  [A Spelling-Book for Advanced Classes] Reference