Answer: OAKTAG

AnswerCrossword Clue
OAKTAGSturdy paper
OAKTAGSchool poster paper
OAKTAGStrong cardboard
OAKTAGPoster material, often
OAKTAGSchool poster material
OAKTAGPoster cardboard
OAKTAGPoster material
OAKTAGPoster stock
OAKTAGArt supply store stock
OAKTAGPoster board