twine vs packthread

twine and packthread both are nouns.

Word	Noun	Adjective	Verb	Adverb
twine	Yes	No	Yes	No
packthread	Yes	No	No	No

As nouns, packthread is a hyponym of twine; that is, packthread is a word with a more specific, narrower meaning than twine:

Other hyponyms of twine include chalk line, snap line, snapline.

twine (noun)	packthread (noun)
a lightweight cord	a strong three-ply twine used to sew or tie packages

twine (verb)	packthread (verb)
spin, wind, or twist together
make by twisting together or intertwining
arrange or coil around
form into a spiral shape