Annihilate means to destroy completely.
The chemical company used a spray to annihilate the weeds in the yard.
Decimate means to destroy a large part of something.
The strong weed killer could decimate many parts of the lawn.
Capitulate means to surrender, come to terms, or acquiesce.
NATO was unable to force the country to capitulate to its demands.
Recapitulate means to sum up, review briefly, or repeat in concise form.
Let us recapitulate what we have learned so far today.
Discover means to find something already in existence, but unknown.
Try to discover the events that have shaped this great country of ours.
Invent means to create something new.
Edison did not invent the light bulb; the inventor was Joseph Swan.