bimorphemic
In Chinese, there are monomorphemic words that contain two characters.
The study was interested in children's production of monomorphemic words.
The prediction is that there will be a big difference between rates of deletion in regular past tense versus monomorphemic forms.

SMART Vocabulary: related words and phrases

Linguistics: morphology & parts of words
-athon
affix
affixation
agglutinate
agglutinative
analytic
contraction
interfix
ion
ism
libfix
monosyllabic
morpheme
morphological
suffix
syllabify
synthetic
that'd
that'll
that's