scrape by vs grapple

scrape by is not a noun while grapple is a noun.

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

As verbs, grapple is a hypernym of scrape by; that is, grapple is a word with a broader meaning than scrape by:

scrape by: manage one's existence barely
grapple: succeed in doing, achieving, or producing (something) with the limited or inadequate means available

Other hypernyms of scrape by include contend, cope, deal, get by, make do, make out, manage.

scrape by (noun)	grapple (noun)
	the act of engaging in close hand-to-hand combat
	a tool consisting of several hooks for grasping and holding; often thrown with a rope
	a dredging bucket with hinges like the shell of a clam

scrape by (verb)	grapple (verb)
manage one's existence barely	to grip or seize, as in a wrestling match
	succeed in doing, achieving, or producing (something) with the limited or inadequate means available