Jacks and Upcast

Jacks noun - A game in which jackstones are thrown and picked up in various groups between bounces of a small rubber ball.

Upcast and jacks are semantically related. in raise topic. In some cases you can use "Upcast" instead a verb "Jacks".

Upcast noun - Air passage consisting of a ventilation shaft through which air leaves a mine.

Jacks and upcast are semantically related. Sometimes you can replace term "Jacks" with "Upcast", this nouns are similar.