crease vs frown line

crease and frown line both are nouns.

Word	Noun	Adjective	Verb	Adverb
crease	Yes	No	Yes	No
frown line	Yes	No	No	No

As nouns, frown line is a hyponym of crease; that is, frown line is a word with a more specific, narrower meaning than crease:

crease (noun)	frown line (noun)
a Malayan dagger with a wavy blade	a facial wrinkle associated with frowning
a slight depression or fold in the smoothness of a surface
an angular or rounded shape made by folding

crease (verb)	frown line (verb)
become wrinkled or crumpled or creased
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
make wrinkled or creased
scrape gently