Final answer:
The number of declensions a word can conform to varies depending on the language. English nouns have two declensions - singular and plural, while other languages like Latin can have multiple declensions with various categories and endings.
Step-by-step explanation:
The number of declensions a word can conform to is determined by the language it belongs to. In English, nouns have two declensions: singular and plural. The singular form usually ends with -s or -es, while the plural form typically ends with -s. For example, the word 'cat' has the singular form 'cat' and the plural form 'cats'.
Other languages, such as Latin, have more complex declension systems with multiple categories and endings depending on factors like gender and case. Latin nouns can belong to up to five different declensions. For example, the Latin word 'puella' (girl) belongs to the first declension, while 'dominus' (lord) belongs to the second declension.