The noun forms of the verb explain are explainer, explanation, and the gerund, explaining.
Quite simply explain that nouns are the words for people, places or things. From there, if your child is ready for more information, you can explain the difference between common, collective, proper and abstract nouns.
Appositives.
No, it is not. The important thing is to use the nouns that are most appropriate to convey the information that you want to impart. You can't tell how you hurt yourself or how to boil an egg using all abstract nouns; and you can't explain your hopes and dreams, your experiences or your feelings using all concrete nouns.
The word explain is a verb. Verbs do not have plurals; only nouns (and pronouns) have plural forms.
Kinds of Nouns: singular and plural nouns common and proper nouns abstract and concrete nouns possessive nouns collective nouns compound nouns count and non-count (mass) nouns gerunds (verbal nouns) material nouns (words for things that other things are made from) attributive nouns (nouns functioning as adjectives)
The two nouns in your sentence are words and nouns, they are plural, common nouns.
The types of nouns are: Singular or plural nouns Common or proper nouns Concrete or abstract nouns Possessive nouns Collective nouns Compound nouns
proper nouns common nouns pro nouns nouns
In Spanish, "the" is "el" for masculine nouns and "la" for feminine nouns. In French, "the" is "le" for masculine nouns and "la" for feminine nouns. In German, "the" is "der" for masculine nouns, "die" for feminine nouns, and "das" for neuter nouns. In Italian, "the" is "il" for masculine nouns and "la" for feminine nouns.
Plural nouns are not capitalized, unless they are proper nouns.
A very tricky subject, plural possessive nouns. Linked below are three different tutorials that each explain them slightly differently. Perhaps one is easier for you than another, so don't give up until you look at each one.
It is correct, it is a common noun. Proper nouns represent unique objects or entities (London, David Cameron, Aston Martin) while common nouns represent classes or groups of objects (cities, tigers, muslims), etc.