This data set gathered from appendix B includes 120 monosyllabic English words (60 word pairs). Within each pair, words contrast in regularity (R vs. E) but are matched for onset phoneme.
sps2002b
A data.frame with 120 rows and 3 variables:
The orthographic word.
Item set. Maps word pairs, contrasting in regularity, but approximately matched for onset phoneme.
Spelling regularity bin: R (regular) or E (exception).
Strain, E., Patterson, K., & Seidenberg, M. S. (2002). Theories of word naming interact with spelling--sound consistency. Journal of Experimental Psychology: Learning, Memory, and Cognition, 28(1), 207-214. doi:10.1037/0278-7393.28.1.207
See source paper for details.