Grade 9.
- disciplinary
- disconnectedly
- discontentedly
- discontentment
- discouragingly
- discourteously
- discreet
- discrepancy
- discriminatory
- disgracefulness
- disgustfulness
- disinformation
- disintegrating
- disintegration
- disinteresting
- disorderliness
- disparity
- displeasurable
- disposition
- disproportionate