viaduct vs span

span vs viaduct

viaduct and span both are nouns.

viaduct is not a verb while span is a verb.

Word	Noun	Adjective	Verb	Adverb
viaduct	Yes	No	No	No
span	Yes	No	Yes	No

As nouns, span is a hypernym of viaduct; that is, span is a word with a broader meaning than viaduct:

viaduct: bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley
span: a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.

Other hypernyms of viaduct include bridge.

viaduct (noun)	span (noun)
bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley	the act of sitting or standing astride
	a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
	the distance or interval between two points
	a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
	two items of the same kind
	the complete duration of something

viaduct (verb)	span (verb)
	to cover or extend over an area or time period

Difference between viaduct and span

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