Used when making something appear larger or more substantial by adding content.

Filling Out

Can refer to non-physical items like stories, not just food or objects.

Not Physical

Means adding more content, but not necessarily improving quality.

Refers to an increase in size or mass, often used in fitness contexts.

The change in size or quantity usually happens over a period of time.

Implies a noticeable or significant gain in size, not just a slight increase.