tower

(noun) a structure taller than its diameter; can stand alone or be attached to a larger building.

(noun) anything that approximates the shape of a column or tower. Synonyms: column, pillar. Examples: "The test tube held a column of white powder." "A tower of dust rose above the horizon." "A thin pillar of smoke betrayed their campsite."

(noun) a powerful small boat designed to pull or push larger ships. Synonyms: tugboat, tug, towboat.

(verb) appear very large or occupy a commanding position. Synonyms: loom, predominate, hulk. Examples: "The huge sculpture predominates over the fountain." "Large shadows loomed on the canyon wall."