Rare and Unobservable

Rare adjective - Being out of the ordinary.

Unobservable and rare are semantically related. In some cases you can use "Unobservable" instead an adjective "Rare".

Nearby Words: rarity, rarely, rareness

Unobservable adjective - Not accessible to direct observation.

Rare and unobservable are semantically related. Sometimes you can use "Rare" instead an adjective "Unobservable".