call option vs span

call option and span both are nouns.

Word	Noun	Adjective	Verb	Adverb
call option	Yes	No	No	No
span	Yes	No	Yes	No

call option (noun)	span (noun)
the option to buy a given stock (or stock index or commodity future) at a given price before a given date	the act of sitting or standing astride
an option to buy	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

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