Uncompleted is a related term of undeveloped.
As adjectives the difference between uncompleted and undeveloped
is that uncompleted is not completed while undeveloped is not developed or used.
uncompleted
English
Adjective
(-)
Not completed.
Usage notes
The word often carries the connotation of "the result of a failure to complete", rather than just incomplete.
undeveloped
English
Alternative forms
* undevelopt
Adjective
(
en adjective)
not developed or used
lagging behind others, especially in economic or social matters