Two experiments were conducted to compare the development of orthograp
hic representations in children learning to read English and Greek. No
nsense words that either shared both orthography and phonology at the
level of the rhyme with real words (comic-bomic), phonology only (comi
c-bommick), or neither (dilotaff) were created for each orthography. E
xperiment 1 compared children's reading of bisyllabic and trisyllabic
nonsense words like bomic vs. bommick, taffodil vs. tafoddyl, and foun
d a significant facilitatory effect of orthographic rhyme familiarity
for English only. Experiment 2 compared children's reading of trisylla
bic nonsense words that either shared rhyme phonology with real words
(tafoddyl) or did not (dilotaff). Significant facilitation in reading
accuracy was found for shared rhyme phonology in English, with a signi
ficant speed advantage in Greek. These results are interpreted in term
s of the level of phonology that is represented in the orthographic re
cognition units being developed by children who are learning to read m
ore and less transparent orthographies.