-s : The suffix used to form the plural of most words; as in roads, elfs, sides, accounts.

-s : The suffix used to form the third person singular indicative of English verbs; as in falls, tells, sends.

-s : An adverbial suffix; as in towards, needs, always, -- originally the genitive, possesive, ending. See -'s.

Example:
What's the different between insurance and bond for a small general contractor business?

Taxonomy
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Defination from the web: