As nouns the difference between gratefulness and selflessness
is that gratefulness is the state of being grateful while selflessness is the quality or state of being selfless.
gratefulness
English
Noun
(-)
The state of being grateful
Synonyms
* gratitude
* thankfulness
Antonyms
* ungratefulness
* ingratitude
* unthankfulness
selflessness
English
Noun
(selflessnesses)
the quality or state of being selfless
Antonyms
* selfishness