• thundershirt,
• undersuit,
• yndershirt,
• hndershirt,
• jndershirt,
• indershirt,
• 8ndershirt,
• 7ndershirt,
• unsershirt,
• undershurt,
• undesrshirt,
• undertshirt,
• undershiert,
• undershirtt,
• undershit,
• untershirt,
• undershirte,
• Undershert,
• Undersrit,
• Undershite

• underprice,
• undersized,
• underfelt,
• undergird,
• under arms,
• undershot,
• underseller,
• undertaker,
• undertake,
• undersexed,
• underpart,
• undercoat,
• underpin,
• underlying,
• underact,
• underbrush,
• underpass,
• underside,
• underseal,
• understand,
• underline,
• underbid,
• undersize,
• underling,
• undersea,
• underivative,
• underhill,
• underslung,
• undersoil,
• underwriter,
• underlie,
• understated,
• underscore,
• undershoot,
• understock,
• underspend,
• underived,
• undermine,
• understanding,
• underwing,
• understate,
• undertone,
• undertow,
• under that,
• undertide,
• undersign,
• under fire,
• underweight,
• undertaking,
• understood,
• undershrub,
• undercut,
• underwear,
• underboss,
• underspent,
• underfur,
• undergarment,
• underrate,
• understaffed,
• underworld,
• underskirt,
• under wraps,
• under it,
• Underdahl,
• undersell,
• undercurrent,
• understudy,
• underwrite,
• underfoot.

The adjective form of the word "undershirt" is "undershirted".

The plural of the "undershirt" can be the "undershirts".

The singular of the "undershirt" can be the "undershirt".