To give one's loyalty or support to (a cause, for example); adopt.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "espouse" in a sentence
"The solution you espouse is far, far worse than the supposed problem."
"The stand that Pastor Hagee and Parsley espouse is not anything new or revelational as "new" or "recently"."
"And unfettered advocacy for one, as you espouse, is clearly more Orwellian."