bitingly vs piercingly

bitingly and piercingly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
bitingly	No	No	No	Yes
piercingly	No	No	No	Yes

As adverbs, bitingly and piercingly are synonyms defined as:

Other synonyms of bitingly include bitter, bitterly.

bitingly (adverb)	piercingly (adverb)
extremely and sharply	extremely and sharply
	in a shrill voice