lather vs flog

lather is a noun but flog is not a noun.

Word	Noun	Adjective	Verb	Adverb
lather	Yes	No	Yes	No
flog	No	No	Yes	No

As verbs, lather and flog are synonyms defined as:

Other synonyms of lather include lash, slash, strap, trounce, welt, whip.

lather (noun)	flog (noun)
the froth produced by soaps or detergents
the foam resulting from excessive sweating (as on a horse)
a workman who puts up laths
agitation resulting from active worry

lather (verb)	flog (verb)
rub soap all over, usually with the purpose of cleaning	beat severely with a whip or rod
exude sweat or lather	beat with a cane
form a lather
beat severely with a whip or rod