We found one dictionary that defines the word pioneerdom:

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1. pioneerdom: Wiktionary

Definitions from Wiktionary (pioneerdom) ▸ noun:  The state of being a pioneer. ▸ Words similar to pioneerdom ▸ Usage examples for pioneerdom ▸ Idioms related to pioneerdom ▸ Wikipedia articles (New!) ▸ Popular adjectives describing pioneerdom ▸ Words that often appear near pioneerdom ▸ Rhymes of pioneerdom ▸ Invented words related to pioneerdom