1. A son's or daughter's son.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• granson,
• grandeos,
• gradson,
• grandman,
• grandsome,
• grandpop,
• granden,
• brandson,
• grandsone,
• grndson,
• gandson,
• grandios,
• grandosn,
• grandsom,
• gradnson,
• gramdson,
• granddson,
• granndson,
• grandsonn,
• grandsun

• granduncle,
• granderson,
• Grand Teton,
• granted,
• groundhog,
• grandmaster,
• grandiosely,
• groundless,
• ground rent,
• Grand Canal,
• GRANDE,
• grandiose,
• grandniece,
• grandiosity,
• grandparent,
• granddad,
• grindstone,
• groundwork,
• grandi,
• granddaddy,
• groundsman,
• grandchild,
• ground pink,
• grenada,
• grand,
• grant,
• girandola,
• grandness,
• grand tour,
• granda,
• grounder,
• granite,
• ground pine,
• grandad,
• grounds,
• grenade,
• grounding,
• groundnut,
• Grandison,
• grandeur,
• granada,
• grandfield,
• granato,
• groundcover,
• grandy,
• grantor,
• Granata,
• groundmass,
• grandstand,
• granadillo,
• grandstaff,
• Grande Dame,
• grandly,
• grantee,
• grandnephew,
• grinds,
• girandole,
• grund,
• Granado,
• granter,
• grandaunt,
• Granth,
• grenadine,
• grandee,
• ground,
• grandpa,
• granados,
• grondin,
• groundling,
• grandma,
• ground out,
• grunden,
• Grants,
• grand piano,
• grenadian,
• grind.

The adjective form of the word "grandson" is "grandsonly".

The plural of the "grandson" can be the "grandsons".

The singular of the "grandson" can be the "grandson".