As nouns the difference between ruddiness and rubicundity
is that ruddiness is the property of being ruddy while rubicundity is the state or condition of being rubicund; ruddiness, redness.
ruddiness
English
Noun
(-)
The property of being ruddy.
rubicundity
English
Noun
(-)
The state or condition of being rubicund; ruddiness, redness.