scrape by vs scrape along

scrape by and scrape along both are verbs.

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

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

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

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