For "courage" or "determination":
* Grit: This emphasizes resilience and perseverance in the face of adversity.
* Mettle: This implies strength of character and the ability to withstand pressure.
* Backbone: This evokes a strong sense of internal strength and willpower.
* Guts: This is a more informal term for courage, especially in risky situations.
* Moxie: This suggests confidence, audacity, and a knack for getting things done.
* Fortitude: This emphasizes mental strength and the ability to endure hardship.
* Valor: This implies bravery and willingness to face danger.
For "liveliness" or "energy":
* Vivacity: This implies a bubbly and animated personality.
* Verve: This suggests enthusiasm, vitality, and a zest for life.
* Spirit: This indicates a lively and positive attitude.
* Fire: This suggests passion and intensity.
* Zip: This implies a sense of energy and quickness.
* Pep: This refers to enthusiasm and vitality.
For "a spark of something":
* Flash: This suggests a brief but intense burst of energy.
* Flicker: This evokes a small, wavering light.
* Glimmer: This implies a faint but noticeable hint of something.
* Hint: This suggests a subtle trace or suggestion of something.
The best synonym for "spunk" will depend on the specific context and the nuance you want to convey.