straight off vs directly

straight off and directly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
straight off	No	No	No	Yes
directly	No	No	No	Yes

As adverbs, straight off and directly are synonyms defined as:

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

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

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