• xastanopsis,
• vastanopsis,
• fastanopsis,
• dastanopsis,
• czstanopsis,
• csstanopsis,
• cwstanopsis,
• cqstanopsis,
• caatanopsis,
• caztanopsis,
• caxtanopsis,
• cadtanopsis,
• caetanopsis,
• cawtanopsis,
• casatanopsis,
• castanoopsis,
• castanopis,
• castanopas,
• castanopia,
• castanopys

• castanea,
• causation,
• Castanon,
• castanets,
• Castanedo,
• castaneda,
• castanospermum.

The adjective form of the word "castanopsis" is "castanopsian".

The plural form of "castanopsis" is "castanopses".

The singular form of the word "castanopsis" is "castanopsis". The word is already in its singular form, as it represents the scientific name of a genus of evergreen trees.