Synonyms of the word 
APPROACHABILITY → ACCESSIBILITY - FRIENDLINESS
approachability
- n. The characteristic of being approachable; the ability to be approached.
accessibility
- n. The quality of being accessible, or of admitting approach; receptiveness.
- n. (computing, web design) Features that increase software usability for users with certain impairments.
friendliness
- n. The quality of being friendly.
If you are interested in words, visit the following sites :
- wiktionary.org/approachability For complete definition of a word
- 1word.ws/approachability to play with words, suffixs, prefixs, etc.