The difference between Invalid and Nonvalid
When used as adjectives, invalid means not valid, whereas nonvalid means not valid.
Invalid is also noun with the meaning: any person with a disability or illness.
Invalid is also verb with the meaning: to exempt from duty because of injury or ill health.
check bellow for the other definitions of Invalid and Nonvalid
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Invalid as an adjective:
Not valid; not true, correct, acceptable or appropriate.
Examples:
"Your argument is invalid because it uses circular reasoning."
"This invalid contract cannot be legally enforced."
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Invalid as a noun (dated, sometimes, offensive):
Any person with a disability or illness.
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Invalid as a noun (dated, sometimes, offensive):
A person who is confined to home or bed because of illness, disability or injury; one who is too sick or weak to care for themselves.
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Invalid as a noun (archaic):
A disabled member of the armed forces; one unfit for active duty due to injury.
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Invalid as an adjective:
Intended for use by an invalid.
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Invalid as a verb (British, transitive):
To exempt from duty because of injury or ill health.
Examples:
"He was invalided home after the car crash."
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Invalid as a verb (transitive):
To make invalid or affect with disease.
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Nonvalid as an adjective:
Not valid.