A syntactic category is either a phrasal category, such as noun phrase or verb phrase, which can be decomposed into smaller syntactic categories, or a lexical category, such as noun or verb, which cannot be further decomposed.
In terms of phrase structure rules, phrasal categories can occur to the left side of the arrow while lexical categories cannot.
The lexical categories are traditionally called the parts of speech. They include nouns, verbs, adjectives, and so on.
A syntacticcategory is either a phrasal category, such as noun phrase or verb phrase, which can be decomposed into smaller syntacticcategories, or a lexical category, such as noun or verb, which cannot be further decomposed.
In terms of phrase structure rules, phrasal categories can occur to the left side of the arrow while lexical categories cannot.
The lexical categories are traditionally called the parts of speech.
Syntactic Hierarchical Structure All the Way Down entails that elements within syntax and within morphology enter into the same types of constituent structures (such as can be diagrammed through binary branching trees).
DM is piece-based in the sense that the elements of both syntax and of morphology are understood as discrete instead of as (the results of) morphophonological processes.
Syntactic Lowering may be a type of Merger as well, presumably occuring after syntax proper but before Vocabulary Insertion.