Unfitness is a related term of debilitation.
As nouns the difference between unfitness and debilitation
is that unfitness is the characteristic of being unfit while debilitation is the act or process of debilitating, or the condition of one who is debilitated; weakness.
unfitness
English
Noun
(es)
The characteristic of being unfit.
debilitation
English
Noun
(
en noun)
The act or process of debilitating, or the condition of one who is debilitated; weakness.