securely vs firmly

securely and firmly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
securely	No	No	No	Yes
firmly	No	No	No	Yes

As adverbs, securely and firmly are synonyms defined as:

securely (adverb)	firmly (adverb)
in a secure manner; in a manner free from danger	with firmness
in an invulnerable manner	with resolute determination
in a manner free from fear or risk	in a secure manner; in a manner free from danger
in a confident and unselfconscious manner