Antonyms of noun mercilessness

1 of 2 senses of mercilessness

Sense 2
mercilessness, unmercifulness -- (inhumaneness evidenced by an unwillingness to be kind or forgiving)
       Antonym of mercifulness (Sense 2)
      => mercifulness, mercy -- (a disposition to be kind and forgiving; "in those days a wife had to depend on the mercifulness of her husband")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun mercilessness

2 senses of mercilessness

Sense 1
cruelty, mercilessness, pitilessness, ruthlessness -- (feelings of extreme heartlessness)
       => heartlessness, coldheartedness, hardheartedness -- (an absence of concern for the welfare of others)

Sense 2
mercilessness, unmercifulness -- (inhumaneness evidenced by an unwillingness to be kind or forgiving)
       => inhumaneness, inhumanity -- (the quality of lacking compassion or consideration for others)