scrape by vs scratch along

scrape by and scratch along both are verbs.

Word	Noun	Adjective	Verb	Adverb
scrape by	No	No	Yes	No
scratch along	No	No	Yes	No

As verbs, scrape by and scratch along are synonyms defined as:

Other synonyms of scrape by include rub along, scrape along, squeak by, squeeze by.

scrape by (verb)	scratch along (verb)
manage one's existence barely	manage one's existence barely