Two parallel underlines for extra emphasis using Unicode.
t̳e̳x̳t̳.̳t̳a̳x̳i̳
Double Underline
t̳e̳x̳t̳.̳t̳a̳x̳i̳
Bold Script
𝓽𝓮𝔁𝓽.𝓽𝓪𝔁𝓲
Elegant Script
𝓉ℯ𝓍𝓉.𝓉𝒶𝓍𝒾
Small Caps
ᴛᴇxᴛ.ᴛᴀxɪ
Gothic / Fraktur
𝔱𝔢𝔵𝔱.𝔱𝔞𝔵𝔦
Double-Struck
𝕥𝕖𝕩𝕥.𝕥𝕒𝕩𝕚
Monospace
𝚝𝚎𝚡𝚝.𝚝𝚊𝚡𝚒
Fullwidth
ｔｅｘｔ.ｔａｘｉ
Bubble Text
ⓣⓔⓧⓣ.ⓣⓐⓧⓘ
Filled Circled
🅣🅔🅧🅣.🅣🅐🅧🅘
Squared
🅃🄴🅇🅃.🅃🄰🅇🄸
Filled Squared
🆃🅴🆇🆃.🆃🅰🆇🅸
Strikethrough
t̶e̶x̶t̶.̶t̶a̶x̶i̶
Underline
t̲e̲x̲t̲.̲t̲a̲x̲i̲
Regional Flags
🇹🇪🇽🇹.🇹🇦🇽🇮
Upside Down
ıxɐʇ˙ʇxǝʇ
Stylised Block
ᑦᴇ᙭ᑦ.ᑦᗩ᙭I
Double Underline uses Unicode combining character U+0333 to add two stacked underlines beneath each letter. A bolder, more emphatic version of the single underline — works in the same places and renders on all modern platforms.