Answer:
That would be the word's connotation.
Explanation:
Connotation- the way a word sounds, the 'sense' that it gives
Ex: the difference between saying 'weird' and 'quirky'
Denotation- the word's definition
So while 'weird' and 'quirky' have the same definition (or denotation), 'quirky' sounds a bit better, so they have different connotations. The 'senses' are a bit different.