O
…resistants
…reinstatesresistant
interests……reinstates
…prettinessinterests
bitternessprettiness
brittlenessbitterness
butterinessbrittleness
…ruttinessbutteriness
According to merriam-webster is one wordruttiness is 2 letters removed from butteriness.
Let’s go back to butteriness.
…subentries
unassertivesubservient
…invertasesunassertive
advertises…invertases
…advertises