helm vs leading

helm and leading both are nouns.

Word	Noun	Adjective	Verb	Adverb
helm	Yes	No	Yes	No
leading	Yes	Yes	No	No

As nouns, leading is a hypernym of helm; that is, leading is a word with a broader meaning than helm:

Other hypernyms of helm include leadership.

helm (noun)	leading (noun)
(figurative) a position of leadership	thin strip of metal used to separate lines of type in printing
steering mechanism for a vessel; a mechanical device by which a vessel is steered	the activity of leading

helm (adjective)	leading (adjective)
	going or proceeding or going in advance; showing the way
	greatest in importance or degree or significance or achievement
	having the leading position or higher score in a contest
	indicating the most important performer or role

helm (verb)	leading (verb)
be at or take the helm of