immediately vs right away

immediately and right away both are adverbs.

Word	Noun	Adjective	Verb	Adverb
immediately	No	No	No	Yes
right away	No	No	No	Yes

As adverbs, immediately and right away are synonyms defined as:

immediately and right away: without delay or hesitation; with no time intervening

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

immediately (adverb)	right away (adverb)
without delay or hesitation; with no time intervening	without delay or hesitation; with no time intervening
near or close by	at once (usually modifies an undesirable occurrence)
bearing an immediate relation