Intransitive refers to a verb that does not take a direct object. For example:
* The bird sings. (Sings does not have a direct object)
Phrase refers to a group of words that acts as a unit within a sentence. There are many different types of phrases, such as noun phrases, verb phrases, prepositional phrases, and adjective phrases.
Example:
* The bird sings beautifully.
In this sentence:
* The bird is a noun phrase.
* sings beautifully is a verb phrase.
* beautifully is an adverbial phrase.
Therefore, there is no "intransitive phrase." The term "intransitive" applies to verbs, while the term "phrase" applies to groups of words.