emphasis

(n) special importance or significance
- the red light gave the central figure increased emphasis
- the room was decorated in shades of grey with distinctive red accents
accent,
(n) intensity or forcefulness of expression
- the vehemence of his denial
- his emphasis on civil rights
vehemence,
(n) special and significant stress by means of position or repetition e.g.
(n) the relative prominence of a syllable or musical note (especially with regard to stress or pitch)
- he put the stress on the wrong syllable
stress, accent,

accent vehemence stress

emphasise emphasised