What is a synonym for characteristics?

Here are some synonyms for "characteristics," depending on the specific nuance you're trying to convey:

General synonyms:

* Traits

* Features

* Attributes

* Qualities

* Properties

* Distinguishing marks

* Aspects

* Facets

More specific synonyms:

* Physical characteristics: Appearance, physique, build

* Personality characteristics: Traits, temperament, disposition

* Behavioral characteristics: Habits, tendencies, mannerisms

* Technical characteristics: Specifications, parameters, specifications

The best synonym will depend on the context of your sentence.