grandpa
My dad and my granda just said "This is your chance, you should take it."
You don't look like your granda.
The children would shout to their gran that granda was on his way home.

SMART Vocabulary: related words and phrases

Family: informal names
baba
bro
bruv
bubba
dad
grandad
grandaddy
grandbaby
grandkid
grandma
mama
mammy
mater
mom
momma
old man
papa
pater
rellie
sis