Why is it die Proliferation?

Proliferation ends in -ion, and almost all nouns ending in -ion are feminine: in a German dictionary, 94% of them take die.

All nouns ending in -ion
Sense 1
die

Meaning

[1] Medicine: Breakung, Jossung

[1] Medizin: Wucherung, Sprossung

[2] Politics: The spreading of weapons of mass destruction

[2] Politik: die Weiterverbreitung von Massenvernichtungswaffen

Examples

[1] You have to prevent the ulcer on the proliferation

[1] Man muss das Geschwür an der Proliferation hindern.

[2] The nuclear weapons blocking contract prohibits the proliferation of nuclear weapons

[2] Der Atomwaffensperrvertrag verbietet die Proliferation von Nuklearwaffen.
More source examples (1)

These dictionary examples can include historical and less common uses.

[2] "Sources of proliferation are often inadequate national export controls or state actors who are specifically with profileration -relevant goods"

[2] „Quellen der Proliferation sind häufig unzureichende nationale Exportkontrollen oder staatliche Akteure, die gezielt mit profilerationsrelevanten Gütern handeln.“

Declension

1 Singular Plural
Nominativ die Proliferation —
Genitiv der Proliferation —
Dativ der Proliferation —
Akkusativ die Proliferation —

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary