"Angelicness" is a unique and specific term to describe someone's angelic qualities. However, there are a few synonyms that can capture the same essence. Words such as benevolence, goodness, and purity all embody the same idea of goodness and innocence. The word "saintliness" can also be used to describe someone who is angelic in nature. Another word that can be used is "divine," which represents the spiritual realm and is associated with goodness and purity. Lastly, the term "heavenly" can be used as a synonym since it represents qualities that are considered to be angelic and similar to those associated with heaven.