Thomas Cassidy said:
the plurals of certain English words ending in "t" vice "ed" actually had a reason.
If you check a KJV you will see that both "built" and "builded" are used.
The endings of certain English words in the KJV do not always match the endings in the pre-1611 English Bibles.
Did later editors of KJV editions know the supposed reason since they sometimes changed the "t" ending?
As early as 1660, there was at least one editor or printer who changed many of the uses of "builded" in the KJV to "built" and some of those changes were in agreement with those uses already in the early 1560 Geneva Bible. Perhaps some of the 1611 edition's use of "builded" were merely kept from the 1602 edition of the Bishops' Bible for no apparent reason besides following its useage.
Genesis 4:17 [buylt--1560 Geneva; building--1602 Bishops] [see Exod. 1:11, Josh. 19:50, Jud. 1:26]
built [2005, 2011 Cambridge] {1660 London} (1700 MP) (2002, 2012 KJVER) (EB) (2006 PENG) (1833 WEB) [NKJV]
builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Genesis 10:11 [see Gen. 33:17, 13:18; Exod. 1:11]
built [2005, 2011 Cambridge] {1660 London} (1700 MP) (2002, 2010 KJVER) (EB) (2006 PENG) (1833 WEB) [NKJV]
builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Genesis 12:7 [see Gen. 13:18, 22:9, 35:7] [builded--1602 Bishops]
there built [2005, 2011 Cambridge] {1660 London} (1700 MP) (2002, 2010 KJVER) (EB) (2006 PENG) [NKJV]
there builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Genesis 13:18 [buylded--1560 Geneva; builded--1602 Bishops] [see Gen. 12:7]
builded (1785 Wilson) (1811 Hewlett)
built (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Genesis 22:9 [buylded--1560 Geneva; built--1602 Bishops]
builded (1785 Wilson) (1811 Hewlett)
built (1769 Oxford, SRB) [1769 Cambridge, DKJB]
Genesis 35:7 [buylt--1560 Geneva; builded--1602 Bishops]
builded (1811 Hewlett)
built (1769 Oxford, SRB) [1769 Cambridge, DKJB]
Numbers 32:38 [built--1560 Geneva; builded--1602 Bishops] [see Num. 32:37]
rebuilt (1853 Boothroyd)
built [2005, 2011 Cambridge] (2002, 2010 KJVER) (2006 PENG) (1833 WEB) [NKJV]
builded (1769 Oxford, SRB) [1769 Cambridge, DKJB]
1 Kings 8:27 [buylt--1560 Geneva; builded--1602 Bishops] [see 2 Chron. 6:18--built--KJV; buylt--Geneva; builded--1602 Bishops] [see also 1 Kings 8:20, 9:3, 10]
have built [2005, 2011 Cambridge] {1660 London} (EB) (2002, 2010 KJVER) (2006 PENG) (1833 WEB) (1853 Boothroyd) [NKJV]
have builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
1 Kings 8:43 [buylt--1560 Geneva; builded--1602 Bishops] [see 2 Chron. 6:38]
have built [2005, 2011 Cambridge] {1660 London} (EB) (2002, 2010 KJVER) (2006 PENG) (1833 WEB) (1853 Boothroyd) [NKJV]
have builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
1 Kings 15:22 [Baasha had buylt--1560 Geneva; Baasa had builded--1602 Bishops] [see 1 Kings 15:17--built]
Baasha had built [2005, 2011 Cambridge] {1660 London} (2002, 2010 KJVER) (2006 PENG) (1833 WEB)
Baasha had builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
1 Kings 15:22 [Asa buylt--1560 Geneva; Asa built--1602 Bishops]
Asa builded (1785 Wilson) (1811 Hewlett)
Asa built (1769 Oxford, SRB) [1769 Cambridge, DKJB]
1 Kings 15:23 [he buylt--1560 Geneva; he builded--1602 Bishops]
he builded (1785 Wilson) (1811 Hewlett)
he built (1769 Oxford, SRB) [1769 Cambridge, DKJB]
2 Kings 23:13 [had buylt--1560 Geneva; had builded--1602 Bishops]
had built [2005, 2011 Cambridge] {1660 London} (EB) (2006 PENG) (1833 WEB) (1853 Boothroyd) [NKJV]
had builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Ezra 4:13 [be buylt--1560 Geneva; be builded--1602 Bishops] [is built--NKJV]
be rebuilt (1853 Boothroyd)
be built [2005, 2011 Cambridge] {1660 London} (1700 MP) (2002, 2010 KJVER) (EB) (2006 PENG) (1833 WEB) (1842 Bernard)
be builded (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]
Ezra 4:21 [buylt--1560 Geneva; builded--1602 Bishops] [built--NKJV]
rebuilt (1853 Boothroyd)
built [2005, 2001 Cambridge] {1660 London} (1700 MP) (2002, 2010 KJVER) (EB) (2006 PENG) (1833 WEB) (1842 Bernard)
builded (1769 Oxford, SRB) [1769 Cambridge, DKJB]
Nehemiah 3:1 [buylt--1560 Geneva; builded--1602 Bishops] [see Neh. 3:13, 14]
build [1648 Cambridge]
built (1675, 1679, 1709, 1715, 1728, 1746, 1747, 1754, 1758, 1762, 1765, 1768, 1772, 1774, 1777 Oxford) [1629, 1637, 1638, 1677, 1683, 1873, 2005, 2011 Cambridge] {1611, 1613, 1614, 1616, 1617, 1631, 1634, 1640, 1644, 1650, 1660, 1672, 1684, 1705, 1706, 1735, 1741, 1743, 1750, 1759, 1760, 1763, 1764, 1767, 1768, 1772 London} (1755 Oxon) (1638, 1715, 1722, 1756, 1760, 1764, 1766, 1769 Edinburgh) (1743, 1762, 1801 Dublin) (1700 MP) (1746 Leipzig) (1774 Fortescu) (1776 Pasham) (1777 Wood) (1782 Aitken) (1843 AFBS) (1853, 1854, 1855, 1858 ABS) (2000, 2002 ZOND) (2002, 2010 KJVER) (EB) (TPB) (HPB) (2006 PENG) (2008, 2010, 2011 HEND) (NHPB) (1833 WEB) [NKJV]
builded (1769 Oxford, SRB) [1743, 1760, 1769 Cambridge, DKJB]
Nehemiah 3:2 [buylded--1560 Geneva; builded--1602 Bishops; built--NKJV]
built the men [2005, 2011 Cambridge] {1660 London} (1700 MP) (2002, 2010 KJVER) (EB) (2006 PENG) (1833 WEB)
builded the men (1769 Oxford, SRB) [1629, 1769 Cambridge, DKJB]