The phrase "by its nature" is commonly used to refer to the way something is inherently or naturally defined. However, there are several synonyms for this phrase that can be used interchangeably, such as "intrinsically", "essentially", or "inherently". These words all convey a sense that something is part of the very nature or essence of a thing, rather than a mere characteristic that may be added or removed. Other similar words or phrases include "by definition", "necessarily", and "by default". When looking for alternative ways to express the concept of a thing being fundamentally defined by its nature, there are many options available to choose from.