Nouns

(n)soapsuds, suds, latherthe froth produced by soaps or detergents
(n)fret, stew, sweat, lather, switheragitation resulting from active worry“don't get in a stew”, “he's in a sweat about exams”
(n)lathera workman who puts up laths
(n)latherthe foam resulting from excessive sweating (as on a horse)

Verbs

(v)flog, welt, whip, lather, lash, slash, strap, trouncebeat severely with a whip or rod“The teacher often flogged the students”, “The children were severely trounced”
(v)latherform a lather“The shaving cream lathered”
(v)latherexude sweat or lather“this unfit horse lathers easily”
(v)soap, latherrub soap all over, usually with the purpose of cleaning