voice
The sense of a particular writer behind the words, created by stance, diction, syntax and tone.
register
The level of formality in language, from slang to technical jargon.
stance
The writer's attitude toward their claims and readers: confident, tentative, critical, generous.
jargon
Specialized vocabulary used where plainer words would do, or used to impress rather than to clarify.
metadiscourse
Words that talk about the writing itself, such as This essay argues or In other words.
connotation
The associations and feelings a word carries beyond its dictionary meaning (its denotation).