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Grandnephew has 1 synonym. The top synonyms for grandnephew are great-nephew. Another word for grandnephew is great-nephew. Browse the full list below.
| Length
| Random | DefinitionA synonym for grandnephew is great-nephew.
Grandnephew has 1 synonym listed on Thesaurasize.
°Grandson of one's brother (fraternal grandnephew) or sister (sororal grandnephew), son of one's nephew or niece, one's sibling's child's male child.
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