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granduncle

noun grand·un·cle \ˈgrand-ˈəŋ-kəl\

Definition of GRANDUNCLE

:  an uncle of one's father or mother
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First Known Use of GRANDUNCLE

15th century

Rhymes with GRANDUNCLE

carbuncle, caruncle, Dutch uncle, furuncle, great-uncle, peduncle, say uncle

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