boom (a surge in popularity or demand)

to get on/ride (a bus, a train, a bicycle); to get in (a car); to mount (a horse) / to accept one's talk; to get on board

riding

(mathematics) power

someone's current personal craze or obsession

a baby boom

sonic boom

(animal husbandry) mounting (as in animal copulation) / (rare, engineering) mounting (as in a piece of equipment)

(animal husbandry) to mount (as in animal copulation) / (rare, engineering) to mount (as in a piece of equipment)

(idiomatic) to get carried away, to become overexcited