directly vs instantly

directly and instantly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
directly	No	No	No	Yes
instantly	No	No	No	Yes

As adverbs, directly and instantly are synonyms defined as:

directly and instantly: without delay or hesitation; with no time intervening

Other synonyms of directly include at once, forthwith, immediately, like a shot, now, right away, straight off, straightaway.

directly (adverb)	instantly (adverb)
without deviation	without delay or hesitation; with no time intervening
in a forthright manner; candidly or frankly	without any delay
without anyone or anything intervening
without delay or hesitation; with no time intervening