1: ἁρμός
(Strong's #719 — Noun Masculine — harmos — har-mos' )

"a joining, joint" (akin to harmozo, "to fit, join"), is found in Hebrews 4:12 , figuratively (with the word "marrow") of the inward moral and spiritual being of man, as just previously expressed literally in the phrase "soul and spirit."

2: ἁφή
(Strong's #860 — Noun Feminine — haphe — haf-ay' )

"a ligature, joint" (akin to hapto, "to fit, to fasten"), occurs in Ephesians 4:16; Colossians 2:19 .