Words that should be added/modified

Word	Occurence	Explanation

Questions to answer:

Difference between abate & attenuate
→ abate can weaken to the point of disappearing, attenuate has to be always present.
Difference between castigate & chastize
Are fervid & fervent the same word?
Connotation of facetious
diatribe vs harangue
→ harangue more official and bombastic?
Difference between obstinate & obdurate
quiescence vs. abeyance
phlegmatic has a negative connotation, doesn't it?
mendacity vs.
presage vs. omen vs. augury
frenetic vs. frantic
imprudence vs. improvidence