Shabu and Upper

Shabu noun - An amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant.

Upper and shabu are semantically related. In some cases you can use "Upper" instead a noun "Shabu".

Upper noun - The higher of two berths.

Shabu and upper are semantically related. Sometimes you can replace term "Shabu" with "Upper", this nouns are similar.