reishi

As nouns the difference between rishi and reishi

is that rishi is a Vedic poet and seer who composed Rigvedic hymns, who alone or with others invokes the deities with poetry of a sacred character while reishi is extract of the bracket fungus (mushroom) (Ganoderma lucidum and sometimes species: Ganoderma tsugae).

As a noun reishi is

extract of the bracket fungus (mushroom) (ganoderma lucidum and sometimes (taxlink)).

Reishi is a synonym of lingzhi.

As nouns the difference between lingzhi and reishi

is that lingzhi is a medicinal mushroom used in traditional Chinese medicine, Ganoderma lucidum while reishi is extract of the bracket fungus (mushroom) (Ganoderma lucidum and sometimes species: Ganoderma tsugae).

As nouns the difference between mushroom and reishi

is that mushroom is any of the fleshy fruiting bodies]] of [[fungus|fungi typically produced above ground on soil or on their food sources (such as decaying wood) while reishi is extract of the bracket fungus (mushroom) (ganoderma lucidum and sometimes (taxlink)).

As an adjective mushroom

is having characteristics like those of a mushroom, for example in shape or appearance, speed of growth, or texture.

As a verb mushroom

is to grow quickly to a large size.

As nouns the difference between fungus and reishi

is that fungus is any member of the kingdom fungi; a eukaryotic organism typically having chitin cell walls but no chlorophyll or plastids fungi may be unicellular or multicellular while reishi is extract of the bracket fungus (mushroom) (ganoderma lucidum and sometimes (taxlink)).