Final answer:
Syntax is the word to describe the grammatical structure of language that is concerned with word order and noun-verb agreement.
Step-by-step explanation:
The word to describe the grammatical structure of language that is concerned with word order and noun-verb agreement is syntax.
Syntax refers to the arrangement of words and phrases to create well-formed sentences in a language. It involves the rules and patterns that dictate how words are organized and relate to each other in a sentence.
For example, in English, the basic word order is subject-verb-object (SVO). This means that a typical English sentence follows the pattern of placing the subject first, followed by the verb, and then the object.