The difference between Additional and Extraneous
When used as adjectives, additional means supplemental or added to something, whereas extraneous means not belonging to, or dependent upon, a thing.
Additional is also noun with the meaning: something added.
check bellow for the other definitions of Additional and Extraneous
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Additional as an adjective:
Supplemental or added to something.
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Additional as a noun:
Something added.
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Extraneous as an adjective:
Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign
Examples:
"to separate gold from extraneous matter"
"Extraneous substances were found on my cup of water."
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Extraneous as an adjective:
Not essential or intrinsic