for·ti·eth 
(fôrtē-ĭth)
(fôrtē-ĭth)n.
1. The ordinal number matching the number 40 in a series.
2. One of 40 equal parts.
forti·eth adv. & adj.
- disorganize
- disorganized schizophrenia
- disorient
- disorientation
- disown
- disparage
- disparagement
- disparager
- disparagingly
- disparate
- disparately
- disparateness
- disparity
- disparlure
- dispassion
- dispassionate
- dispassionately
- dispassionateness
- dispatch
- dispatcher
- dispel
- dispensability
- dispensable
- dispensableness
- dispensary