Crop up and Pop in

Crop up verb - To come to one's attention especially gradually or unexpectedly.

Pop in and crop up are semantically related in come into sight topic. In some cases you can use "Pop in" instead a verb "Crop up".

Pop in verb - To make a brief visit.

Crop up and pop in are semantically related in come into sight topic. Sometimes you can use "Crop up" instead a verb "Pop in".