'uwl (Hebrew #193)
the body (as being rolled together); also powerful
KJV usage: mighty, strength.
Pronounce: ool
Origin: from an unused root meaning to twist, i.e. (by implication) be strong
'ayil (Hebrew #352)
properly, strength; hence, anything strong; specifically a chief (politically); also a ram (from his strength); a pilaster (as a strong support); an oak or other strong tree
KJV usage: mighty (man), lintel, oak, post, ram, tree.
Pronounce: ah'-yil
Origin: from the same as 193