sentence constituent
linguistic unit constituting a phrase, a proposition or an expression
subject
word or phrase which controls the verb in the clause; one of the two main constituents of a clause (the other being predicate)
object
grammatical term; argument in a proposition
grammatical modifier
optional element in phrase structure or clause structure
vocative expression
in syntax, a noun phrase which identifies the addressee, sometimes to catch its attention
predicator
concept in modern linguistics
zero
empty segment in linguistic morphology
predicate
sentence constituent
predicate
sentence constituent
dependent
in linguistics a sentence element that is subordiate to the head
parenthesis
explanatory or qualifying word, clause, or sentence inserted into a passage