• gostaceae,
• bostaceae,
• nostaceae,
• jostaceae,
• uostaceae,
• yostaceae,
• histaceae,
• hkstaceae,
• hlstaceae,
• hpstaceae,
• h0staceae,
• h9staceae,
• hoataceae,
• hoztaceae,
• hoxtaceae,
• hodtaceae,
• hostacae,
• hostacee,
• hhostaceae,
• hostace

• hostage.

The adjective form of the word "Hostaceae" is "hostaceous".

The plural form of the word "hostaceae" is "hostaceae" as it is already a plural word.

The singular form of the word "Hostaceae" is "Hostaceae". The word "Hostaceae" is already in plural form as it refers to a family of plants commonly known as the Hosta family.