Nov 24 - The U.S. economy grew at a healthier clip in the third quarter than initially thought, suggesting resilience that could help give the Federal Reserve confidence to raise interest rates next month.<br />The Commerce Department on Tuesday said the nation's gross domestic product grew at a 2.1 percent annual pace, not the 1.5<br /><br />The growth estimate was also boosted by upward revisions to business spending on equipment and investment in home building.<br />labor market, rising house prices, which are boosting household wealth, as well as low inflation.<br />Growth in exports, which have been hurt by a strong dollar and sluggish global demand, were revised to show a slower 0.9<br /><br />rate of increase.