Answer: hopon

AnswerCrossword Clue
HOPONLeap aboard
HOPONBoard a moving vehicle
HOPONInvitation to join a hayride
HOPON"... Pop" (Dr. Seuss classic)
HOPONBus driver's solicitation
HOPONBoard, informally
HOPONCyclist's offer
HOPONBiker's invitation to a friend
HOPON"... Pop," Seuss book
HOPONDr. Seuss's "... Pop"
HOPONClimb aboard.
HOPONGet aboard.
HOPONScold severely: Slang.
HOPONScold: Slang.
HOPONJump: 2 words.
HOPONBoard a trolley, perhaps
HOPON".. Pop" (Seuss classic)
HOPONBoard, as a cable car
HOPONHayride invite
HOPONBiker's welcome
HOPONBiker's invite
HOPON"All aboard!"
HOPONBoard, as a trolley
HOPON"Sometimes, when I sleep at night, I think of '... Pop'" (Dubya, April 2, 2002)
HOPONBoard
HOPONBiker's invitation
HOPONJoin a bandwagon
HOPONBoard, in a way
HOPON"Come aboard!"
HOPON".. Pop" (Seuss book)
HOPONMotorcyclist's invitation
HOPONBoard, as a bus