Infirmness is a related term of faintness.
As nouns the difference between infirmness and faintness
is that infirmness is the quality of being infirm; feebleness while faintness is the property of being or feeling faint.
faintness
English
Noun
The property of being or feeling faint.
Synonyms
* faintheartedness
* dimness
See also
* giddiness
* light-headedness
* vertigo