concretize vs peg down

concretize and peg down both are verbs.

Word	Noun	Adjective	Verb	Adverb
concretize	No	No	Yes	No
peg down	No	No	Yes	No

As verbs, peg down is a hypernym of concretize; that is, peg down is a word with a broader meaning than concretize:

Other hypernyms of concretize include nail down, narrow, narrow down, pin down, specify.

concretize (verb)	peg down (verb)
become specific	define clearly
make something concrete	fasten or secure with a wooden pin