We found one dictionary that defines the word overtightness:

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1. overtightness: Wiktionary

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