There are many synonyms for "earth," depending on the specific context you're using it in. Here are some options:

Planet:

* Globe

* World

* Planet

* Terra (Latin)

* Gaia (Greek)

Soil/Ground:

* Dirt

* Soil

* Ground

* Land

* Clay

* Sand

* Loam

Humanity/People:

* Mankind

* Humankind

* Humanity

Other:

* Terra firma (Latin for "solid ground")

* The blue planet

* Mother Earth

* The planet we live on

Examples:

* "The globe is a beautiful place." (referring to the planet)

* "He knelt in the dirt and planted a seed." (referring to soil)

* "The humanity of the situation was clear." (referring to people)

To choose the best synonym, consider the specific meaning you want to convey and the context of your sentence.