This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of highlight.

n. An area of the skin or hair containing highlights.

adj. Causing emphasis, drawing attention; revealing.

n. an area of lightness in a picture

"Another point worth highlighting is that napping is not just a cure for drowsiness."

highlighted    highlighting    highlights   

makeup    lightness    light    detail    item    particular    set-off    bring out   

foreground    spotlight    play up   

skylight    twilight   

sheen    tint    blotch    blur    tinge    orb    glint    coloring    tress    luster