[buttocks]

Deep thoughts: why aren’t “increment” and “excrement” opposites?

[Joker_vD]

Because "increase" and "excrete" have completely different roots that only coincidentally coincide when the verbal nouns corresponding to those words are formed.

[knodi123]

now do "progress" and "congress"!

[IWeldMelons]

Your name checks out. You should be an expert in that (excremental) matters.