Appositive: a grammatical construction in which two elements, normally noun phrases, are placed side by side, with one element serving to define
or modify the other. When this device is used, the two elements are said to be in apposition. For example in the phrase "my friend Alice" the name
"Alice" is in apposition to "my friend".--Wikipedia


Clause: a word or group of words consisting of a subject and a predicate.

Conjunctive Adverb

Coordinating Conjunction

Dependent Clause: (or subordinate clause): a clause that, although it contains a subject and predicate, cannot stand alone as a sentence. It
does not express a complete thought and, therefore, sounds incomplete when standing alone.

Independent Clause: a clause (containing a subject and predicate) that can stand by itself as a grammatically viable simple sentence.
 
Phrase: Two or more words in sequence that form a syntactic unit that is less than a complete sentence.

Subordinating Conjunction
Definitions
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