Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun underline

1 sense of underline

Sense 1
underscore, underline -- (a line drawn underneath (especially under written matter))
       => stroke -- (a mark made on a surface by a pen, pencil, or paintbrush; "she applied the paint in careful strokes")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb underline

2 senses of underline

Sense 1
underscore, underline, emphasize, emphasise -- (give extra weight to (a communication); "Her gesture emphasized her words")
       => stress, emphasize, emphasise, punctuate, accent, accentuate -- (to stress, single out as important; "Dr. Jones emphasizes exercise in addition to a change in diet")

Sense 2
underline, underscore -- (draw a line or lines underneath to call attention to)
       => mark -- (make or leave a mark on; "the scouts marked the trail"; "ash marked the believers' foreheads")