back out vs crawfish out

back out and crawfish out both are verbs.

Word	Noun	Adjective	Verb	Adverb
back out	No	No	Yes	No
crawfish out	No	No	Yes	No

As verbs, back out and crawfish out are synonyms defined as:

back out and crawfish out: make a retreat from an earlier commitment or activity

Other synonyms of back out include back away, crawfish, pull back, pull in one's horns, retreat, withdraw.

back out (verb)	crawfish out (verb)
make a retreat from an earlier commitment or activity	make a retreat from an earlier commitment or activity
move out of a space backwards