We can often recognise a noun by
its position in the sentence.
Nouns often come after a determiner (a determiner is a word like a, an, the, this, my, such):
• a relief
• an afternoon
• the doctor
• this word
• my house
• such stupidity
Nouns often come after one or more adjectives:
• a great relief
• a peaceful afternoon
• the tall, Indian doctor
• such crass stupidity