s, a, e, p, c, h, r, t, u are letters that make 'phrase structure'
structure, RAS, re, SE, pH, rase, as, phrase, CT, RA, Ur, AS, Ra, Re, As, Ru, Se, hr are words within 'phrase structure'
1 possible definitions for 'phrase structure'
Under this definition, phrase structure is a noun and has the following properties:
syntax, sentence structure have the same meaning as 'phrase structure'
'phrase structure' can be a type of structure.
'phrase structure' can be a category of linguistics.
syntactic, syntactical, grammarian, syntactician are derivatives of 'phrase structure'.