Watercraft Plural. Watercraft definition skill in boating and water sports. Watercraft definition is - skill in aquatic activities such as managing boats.
For example when talking about watercraft you would not say thirteen watercrafts you would say thirteen watercraft The important distinction to make here is that culture and necessity drive language not the other way around. However OED mentions that the plural form aircrafts is rare and there is one citation that aircrafts is used. A boat or ship or such vessels collectively Meaning pronunciation translations and examples.
Where a singular noun ends in a sibilant sound the plural is formed by adding ɪz or əz in some.
In English there are six sibilant consonants namely s z ʃ ʒ tʃ dʒ. Add either s or es There are no rules for this - you have to know mangoes or mangos zeros tomatoes. In reference to various types of watercraft or a collection of watercraft. However in more specific contexts the plural form can also be watercraft eg.