Is “Followup” a Scrabble word?
Yes
FOLLOWUP
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Followup
noun
1.A subsidiary action taken in response to an event.
2.A posted message on a newsgroup, etc. in reply to a previous one.
3.A shot on goal directly following another that has been saved.