The noun dentistry is an uncountable noun, a word for the branch of medicine involving the mouth, teeth, and gums. The plural form is dentistry practices.
The boy studied dentistry at university.
The word crises is a plural word; it is the plural form of the word crisis.
There is no plural word for if.
The plural word for delay is delays.
歯科 (shika) is dentistry.
A non-plural word, a word (noun or pronoun) that is not plural is singular, a word for just one.
the plural word is comedones
No it's a singular word. A plural word would be "have".
There is no 'plural form' of the word 'minute'. The word is both singular and plural.
There is no plural form for the word, countries. This word itself is a plural.
The plural for of the word planet is the word planets.
No, the plural of problem is problems.