abstract
existing only in the mind
concrete (?)
capable of being perceived by the senses
connotation
the implied meaning of a word
verisimilitude
the appearance of being true or real
archetype
a very typical example of a certain person or thing
etymology
the origin and history of a word
subtext
an underlying and often distinct theme in a piece of writing or conversation
motif
a recurrent image, word, phrase, object or action that tends to unify a literary work
denotation
the dictionary definition of a word
syntax
an arrangement of words and phrases to create well-formed sentences in a language