ser·mon·ize
(sûr′mə-nīz′)v. ser·mon·ized, ser·mon·iz·ing, ser·mon·iz·es
v.tr. To deliver a sermon to (someone).
v.intr. To deliver or speak as though delivering a sermon.
ser′mon·iz′er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sermonizing
(ˈsɜːməˌnaɪzɪŋ) or sermonising
ncensorious the act of talking as if delivering a sermon
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014