steering system vs helm

steering system and helm both are nouns.

Word	Noun	Adjective	Verb	Adverb
steering system	Yes	No	No	No
helm	Yes	No	Yes	No

As nouns, helm is a hyponym of steering system; that is, helm is a word with a more specific, narrower meaning than steering system:

steering system: a mechanism by which something is steered (especially a motor vehicle)
helm: steering mechanism for a vessel; a mechanical device by which a vessel is steered

Other hyponyms of steering system include power-assisted steering, power steering, rudder.

steering system (noun)	helm (noun)
a mechanism by which something is steered (especially a motor vehicle)	(figurative) a position of leadership
	steering mechanism for a vessel; a mechanical device by which a vessel is steered

steering system (verb)	helm (verb)
	be at or take the helm of