overhand vs round-arm

overhand and round-arm both are adjectives.

Word	Noun	Adjective	Verb	Adverb
overhand	No	Yes	No	No
round-arm	No	Yes	No	Yes

overhand (adjective)	round-arm (adjective)
with hand brought forward and down from above shoulder level	with the arm swung round at shoulder height
sewn together with overhand stitches (close vertical stitches that pass over and draw the two edges together)

overhand (adverb)	round-arm (adverb)
	with an outward or horizontal swing of the arm