seam vs felled seam

seam and felled seam both are nouns.

Word	Noun	Adjective	Verb	Adverb
seam	Yes	No	Yes	No
felled seam	Yes	No	No	No

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

seam: joint consisting of a line formed by joining two pieces
felled seam: seam made by turning under or folding together and stitching the seamed materials to avoid rough edges

Other hyponyms of seam include fell, surgical seam, suture, welt.

seam (noun)	felled seam (noun)
joint consisting of a line formed by joining two pieces	seam made by turning under or folding together and stitching the seamed materials to avoid rough edges
a stratum of ore or coal thick enough to be mined with profit
a slight depression or fold in the smoothness of a surface

seam (verb)	felled seam (verb)
put together with a seam