Synonyms of the word 
BLITHENESS → CHEERFULNESS - HAPPINESS
blitheness
- n. The characteristic of being blithe.
cheerfulness
- n. The state of being cheerful; joy.
happiness
- n. (uncountable) The emotion of being happy; joy.
- n. (archaic, uncountable) prosperity, thriving, wellbeing.
- n. (archaic, uncountable) Good luck; good fortune.
- n. (obsolete, countable) Fortuitous elegance; unstudied grace; — used especially of language.
If you are interested in words, visit the following sites :
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- 1word.ws/blitheness to play with words, suffixs, prefixs, etc.