"Hair" is generally considered an uncountable noun when referring to hair in general or as a mass, as in "She has beautiful hair." However, when referring to individual strands or specific instances, it can be treated as a countable noun, such as in "I found three hairs on my shirt." The context determines how it is classified.
Transport is both countable and uncountable as a noun.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
The word hair can be both a countable noun and a non countable noun, depending on how it is used. For example in the sentence "Mary has long blonde hair", it is non countable. In the sentence "Dad is getting a few gray hairs" it is countable.
Shark is a countable noun.
countable
Countable
The noun 'daytime' is an uncountable noun.
The noun 'animal' is a countable noun. The plural form is animals.
Prawn - prawns is the plural - is a countable noun
The word 'violence' is an uncountable noun.
Pasta is a countable noun
Countable