| 1-21 of 21Flashcard sets with a 'impregnable' term meaning 'impossible to attack successfully' |
| # | Title | Terms | Date |
| 1 | Bk8(5) L19by annaolson | 17 terms | April 28, 2009 |
| 2 | Wordly Wise 19by JLS5450 | 15 terms | May 14, 2009 |
| 3 | WW 19by gabstract0020 | 15 terms | March 26, 2009 |
| 4 | Lesson 19 by arabjime | 15 terms | May 6, 2009 |
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| 5 | WW. lesson 19by kaitlin1067 | 15 terms | March 26, 2009 |
| 6 | Worldy Wise Lesson #19by CelticGrl12 | 15 terms | May 14, 2009 |
| 7 | Wordly Wise Book 5 Lesson 19by AlExAnDeRMO0RE125 | 15 terms | May 4, 2007 |
| 8 | L. 19 Vocab & Greekby ReniFrog | 20 terms | May 13, 2008 |
| 9 | spell 2by stormy | 5 terms | May 13, 2008 |
| 10 | WW8 Lesson 19by jculhane | 15 terms | May 15, 2009 |
| 11 | Wordly Wise 17-20by thestrawbery09 | 76 terms | May 14, 2009 |
| 12 | Lesson 19 Wordly Wiseby chattin1234567 | 23 terms | May 6, 2009 |
| 13 | Wordly Wise Lesson 19by lexie123phps | 15 terms | May 19, 2009 |
| 14 | Book 5 Lesson 19by wordlywisenerd | 22 terms | October 6, 2009 |
| 15 | Lesson 19 vocab and greek rootsby jakotatio | 20 terms | May 16, 2008 |
| 16 | lesson 19 by big rob coolby RobertWelch | 15 terms | May 7, 2007 |
| 17 | 1984 Vocab Chap 6by jpschulte | 11 terms | February 27, 2008 |
| 18 | fra ww 19 3000by penningtonc | 23 terms | May 1, 2008 |
| 19 | vocab lession19by horsemagnuson | 15 terms | May 20, 2008 |
| 20 | Wordly Wise 5-19by lmartensen | 15 terms | October 21, 2009 |
| 21 | Vocabulary Quiz #19by pwagoner | 15 terms | March 25, 2008 |