strong vs strengthened

strong and strengthened both are adjectives.

Word	Noun	Adjective	Verb	Adverb
strong	No	Yes	No	No
strengthened	No	Yes	No	No

strong (adjective)	strengthened (adjective)
having strength or power greater than average or expected	given added strength or support
having a strong physiological or chemical effect
being distilled rather than fermented; having a high alcoholic content
strong and sure
freshly made or left
not faint or feeble
immune to attack; incapable of being tampered with
of verbs not having standard (or regular) inflection
having or wielding force or authority
of good quality and condition; solidly built