span

(noun) the complete duration of something. Examples: "The job was finished in the span of an hour."

(noun) the distance or interval between two points.

(noun) two items of the same kind. Synonyms: couple, pair, twosome, twain, brace, yoke, couplet, distich, duo, duet, dyad, duad.

(noun) a unit of length based on the width of the expanded human hand (usually taken as 9 inches).

(noun) a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.. Synonyms: bridge.

(noun) the act of sitting or standing astride. Synonyms: straddle.

(verb) to cover or extend over an area or time period. Synonyms: cross, traverse, sweep. Examples: "Rivers traverse the valley floor", "the parking lot spans 3 acres." "The novel spans three centuries."