[wirrbel]

Feuerzeug is a lighter, its a fixed term, nothing "wobbly" that relates to fire-stuff.

Zünder is an igniter/detonator, Zündung is the ignition.

Zeug can be used as "thing", but it is frequently used when refearing to gear. So "Feuerzeug" is like "Firegear", "Werkzeug" is the "gear for working" (tools).

[biztos]

There is Zündholz for “match” but lo[0], apparently there is/was Zündzeug:

https://www.dwds.de/wb/dwb/zündzeug

[0]: https://en.wiktionary.org/wiki/lo