Zeal
/ziːl/
noun
The fervour or tireless devotion for a person, cause, or ideal and determination in its furtherance; diligent enthusiasm; powerful interest.
“She extols the virtues of veganism with missionary zeal.”
A person who exhibits such fervour or tireless devotion.
The collective noun for a group of zebras.
Synonyms: ardour, eagerness, enthusiasm, intensity, passion, dazzle, herd, zealot