Synonyms of the word 
WHOLEHEARTEDNESS → HEARTINESS - SINCERITY - WILLINGNESS
wholeheartedness
- n. the condition of being wholehearted.
heartiness
- n. The characteristic of being hearty; fillingness; wholesomeness.
sincerity
- n. The quality or state of being sincere; honesty of mind or intention; freedom from simulation, hypocrisy,…
willingness
- n. The state of being willing.
If you are interested in words, visit the following sites :
- wiktionary.org/wholeheartedness For complete definition of a word
- 1word.ws/wholeheartedness to play with words, suffixs, prefixs, etc.