loudly vs aloud

loudly and aloud both are adverbs.

Word	Noun	Adjective	Verb	Adverb
loudly	No	No	No	Yes
aloud	No	No	No	Yes

As adverbs, loudly and aloud are synonyms defined as:

Other synonyms of loudly include loud.

loudly (adverb)	aloud (adverb)
with relatively high volume	using the voice; not silently
used as a direction in music; to be played relatively loudly	with relatively high volume
in manner that attracts attention