As nouns the difference between godson and grandson
is that godson is a male child whose baptism is sponsored by a godparent while grandson is a son of one's child.
godson
English
Noun
(
en noun)
A male child whose baptism is sponsored by a godparent.
Related terms
* godchild
* goddaughter
* godfather
* godmother
* godparent
grandson
English
Noun
(
en noun)
A son of one's child.
Synonyms
* grandboy
Antonyms
* (with regard to gender) granddaughter
* (with regard to ancestry) grandmother, grandfather
Hypernyms
* grandchild