General Transparency:
* Clarity: This emphasizes the clear understanding or lack of ambiguity.
* Openness: This refers to the willingness to share information and be honest.
* Visibility: This focuses on the ability to see through something, both literally and metaphorically.
Specific Transparency:
* Honesty: This emphasizes the lack of deception or concealment.
* Accountability: This focuses on being responsible for one's actions and decisions.
* Integrity: This highlights the adherence to moral and ethical principles.
The best abstract noun for "transparent" will depend on the specific context and the meaning you want to convey.