Synonyms of the word

carefreeness

• n. The property of being lighthearted, joyous, cheerful, without a care.

blitheness

• n. The characteristic of being blithe.

cheerfulness

• n. The state of being cheerful; joy.

insouciance

• n. carelessness, heedlessness, indifference, or casual unconcern.
• n. nonchalance.

irresponsibility

• n. The character or state of being irresponsible; lack of or freedom from responsibility; want of accountability.

irresponsibleness

• n. The quality of being irresponsible.

lightheartedness

• n. (uncountable) The property of being lighthearted, joyous, cheerful, without a care.
• n. (countable) An amusement or item of a pleasant but inconsequential nature.

lightsomeness

• n. (archaic) The quality of being lightsome.