ripost

As an adjective ripest

is (ripe).

As a noun ripost is

(fencing) a thrust given in return after parrying a lunge.

As nouns the difference between ripost and repost

is that ripost is a thrust given in return after parrying a lunge while repost is {{cx|Internet|lang=en}} The act of posting again; the material thus posted.

As a verb repost is

to post again.

As nouns the difference between taxonomy and ripost

is that taxonomy is the science or the technique used to make a classification while ripost is (fencing) a thrust given in return after parrying a lunge.