Synonyms of the word

underwear

• n. Clothes worn next to the skin, underneath outer clothing.
• n. Underpants (boxers, briefs, panties, etc) and bras.

underclothes

• n. (plural only) clothes worn next to the skin and underneath outer clothing.

underclothing

• n. clothing worn next to the skin; underwear.

undergarment

• n. Any garment worn underneath others, especially one worn next to the skin; an item of underwear.
• n. (religion, in the plural) Temple garments worn by the followers of the Church of Jesus Christ of Latter-day…

unmentionable

• adj. Not mentionable.