abysm vs abyss

abysm and abyss both are nouns.

Word	Noun	Adjective	Verb	Adverb
abysm	Yes	No	No	No
abyss	Yes	No	No	No

As nouns, abysm and abyss are synonyms defined as:

abysm and abyss: a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)

abysm (noun)	abyss (noun)
a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)	a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)