pelt along vs buck

pelt along is not a noun while buck is a noun.

Word	Noun	Adjective	Verb	Adverb
pelt along	No	No	Yes	No
buck	Yes	No	Yes	No

As verbs, buck is a hyponym of pelt along; that is, buck is a word with a more specific, narrower meaning than pelt along:

Other hyponyms of pelt along include barge, push forward, thrust ahead, charge, shoot, shoot down, tear, dart, dash, flash, scoot, scud, shoot.

pelt along (noun)	buck (noun)
	mature male of various mammals (especially deer or antelope)
	a framework for holding wood that is being sawed
	a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting
	a piece of paper money worth one dollar

pelt along (verb)	buck (verb)
move hurridly	jump vertically, with legs stiff and back arched
	move quickly and violently
	resist
	to strive with determination