hypha vs rhizomorph

hypha and rhizomorph both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypha	Yes	No	No	No
rhizomorph	Yes	No	No	No

As nouns, rhizomorph is a hyponym of hypha; that is, rhizomorph is a word with a more specific, narrower meaning than hypha:

hypha: any of the threadlike filaments forming the mycelium of a fungus
rhizomorph: a dense mass of hyphae forming a root-like structure characteristic of many fungi

Other hyponyms of hypha include conidiophore.

hypha (noun)	rhizomorph (noun)
any of the threadlike filaments forming the mycelium of a fungus	a dense mass of hyphae forming a root-like structure characteristic of many fungi