the closest synonym for extend would be bigger or longer cause if your ganna extend something your going to make it bigger or longer.
Overabundance Contamination Deformity or Insufficiency I dont know!
The synonym of optimize is perfect.
If it was just Culminate instead of Culminated, then Climax would be a synonym!!
Another word for rough would be rugged. You could also say choppy or coarse.
Probable
The closest synonym to the word visible would be 'in view'.
The closest synonym for equipped would be armed.
the correct synonym for the word maintaining is Preserving.
The closest synonym for the word "contentions" would be "disputes" or "arguments" as it refers to conflicts or disagreements between people.
I think "recommended" would be the closest.
impending
stop
challenging
guaranteed
Particulars
Significant.
Foresee