* "Recognizing" is a verb: It's the action of identifying something.
* "Nouns" is a noun: It refers to a category of words.
* "Recognizing nouns" together act as a gerund: A gerund is a verb acting as a noun (like "swimming" in "Swimming is fun").
So, is "recognizing nouns" a noun? It depends on how you use it:
* As a noun: You could say, "Recognizing nouns is a crucial language skill." Here, it's acting as the subject of the sentence.
* As a verb phrase: You could say, "I am recognizing nouns in this text." Here, it's the verb phrase describing the action.
The key takeaway: "Recognizing nouns" is a noun phrase, acting as a noun when used in certain grammatical contexts. However, the individual parts ("recognizing" and "nouns") have different functions.