corrugated fastener vs holdfast

corrugated fastener and holdfast both are nouns.

Word	Noun	Adjective	Verb	Adverb
corrugated fastener	Yes	No	No	No
holdfast	Yes	No	No	No

As nouns, holdfast is a hypernym of corrugated fastener; that is, holdfast is a word with a broader meaning than corrugated fastener:

corrugated fastener: a small strip of corrugated steel with sharp points on one side; hammered across wood joints in rough carpentry
holdfast: restraint that attaches to something or holds something in place

Other hypernyms of corrugated fastener include fastener, fastening, fixing.

corrugated fastener (noun)	holdfast (noun)
a small strip of corrugated steel with sharp points on one side; hammered across wood joints in rough carpentry	restraint that attaches to something or holds something in place