We found one dictionary that defines the word suppressal:

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1. suppressal: Wiktionary

Definitions from Wiktionary (suppressal) ▸ noun:  Act of suppressing; suppression. ▸ Words similar to suppressal ▸ Usage examples for suppressal ▸ Idioms related to suppressal ▸ Wikipedia articles (New!) ▸ Popular adjectives describing suppressal ▸ Words that often appear near suppressal ▸ Rhymes of suppressal ▸ Invented words related to suppressal