What are synonyms of atlas?

Here are some synonyms for "atlas," depending on the context:

For "a collection of maps":

* Map collection

* Cartographic compendium

* Gazetteer

* Road atlas (if specifically for roads)

* World map (if it covers the entire globe)

For "the first vertebra of the spine":

* First cervical vertebra

* C1 vertebra

* Vertebra prominens (though this refers to the most prominent vertebra in the neck, which might not always be the atlas)

For "a mythological figure who holds up the heavens":

* Titan (in general)

* Bearer of the heavens

* Sky-bearer

* Atlas, the Titan" (the specific name)

Remember that the best synonym will depend on the specific context of your usage.