The difference between Come about and Occur
When used as verbs, come about means to come to pass, whereas occur means to happen or take place.
check bellow for the other definitions of Come about and Occur
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Come about as a verb (intransitive):
To come to pass; to develop; to occur; to take place; to happen.
Examples:
"We have to ask, how did this come about?"
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Come about as a verb (intransitive, nautical):
To tack; to change tack; to maneuver the bow of a sailing vessel across the wind so that the wind changes from one side of the vessel to the other; to position a boat with respect to the wind after tacking. See also .
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Come about as a verb (intransitive):
To change; to come round.
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Occur as a verb (intransitive):
To happen or take place.
Examples:
"The liftoff will occur in exactly twelve seconds."
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Occur as a verb (intransitive):
To present or offer itself.
Examples:
"I will write if the opportunity occurs."
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Occur as a verb (impersonal):
To come or be presented to the mind; to suggest itself.
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Occur as a verb (intransitive, sciences):
To be present or found.
Examples:
"The chemical monofluoroacetate occurs in all parts of ''Dichapetalum cymosum'', and is responsible for its toxic effects."