General terms:
* Organism: This is the most scientific and general term.
* Creature: This word often implies animals, but can be used for plants too.
* Being: This term has a more philosophical or abstract connotation, implying consciousness or existence.
* Life form: This is a more technical term used in biology and astrobiology.
Specific terms:
* Animal: For living things that move and eat other organisms.
* Plant: For living things that make their own food through photosynthesis.
* Fungus: For living things that decompose organic matter.
* Bacterium: For microscopic single-celled organisms.
Figurative terms:
* Soul: This is a metaphorical term for a living being's essence or spirit.
* Entity: This term is often used in philosophy and science fiction to refer to anything that exists, including living beings.
The best word to use will depend on the specific context and the desired meaning.