Answer: aldehyde and ketone
Justification:
These are the functional groups of those organic compounds:
Compound general formula name of the functional group
Alcohol R - OH hydroxil
Ether R - O - R' ether
O
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Aldehyde - C - H Carbonyl
O
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Ketone R - C - R' Carbonyl
O H
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Amide - C - N - R Amide
Amine R - NH2 Amine
So, the only pair of compounds that share a functional group is aldehyde and ketone.