The other options are what I would naturally use in a conversation, is this just a case where both options can be correct?

AI asked AI first and it said that "Rolling stock" is preferable and "rail stock"vwas not used even though in Reverso context, that was one of the variants. As native English speakers, do you think it's correct?

I put the key in the scooter's ignition and turned it.

Two weeks is enough for a vacation

I'm always surprised that I can go my whole life without hearing a particular word, then after hearing it once it seems to be everywhere. Beclowned. I like it but it seems to have gained quite a bit of traction in a pretty short time.