complete solution
Surcharge - correct answer ✔✔ An addition charge, tax, or cost.
Surface - correct answer ✔✔ Uppermost or uppermost area; top layer.
Surfeit - correct answer ✔✔ Overindulgence in eating or drinking; an excessive amount.
Surmise - correct answer ✔✔ To guess, to infer without certain evidence.
Surveillance - correct answer ✔✔ A watch kept over someone or something.
Surplus - correct answer ✔✔ An amount greater than needed.
Subsequent - correct answer ✔✔ Occurring later, following.
Subservient - correct answer ✔✔ Excessively submissive.
Subsidiary - correct answer ✔✔ Subordinate or secondary.
Substantiate - correct answer ✔✔ To establish by proof.
Subvert - correct answer ✔✔ To overthrow something, such as a government; to cause the ruin
of.