hara-kiri vs harakiri

hara-kiri and harakiri both are nouns.

Word	Noun	Adjective	Verb	Adverb
hara-kiri	Yes	No	No	No
harakiri	Yes	No	No	No

As nouns, hara-kiri and harakiri are synonyms defined as:

hara-kiri and harakiri: ritual suicide by self-disembowelment on a sword; practiced by samurai in the traditional Japanese society

Other synonyms of hara-kiri include harikari, seppuku.

hara-kiri (noun)	harakiri (noun)
ritual suicide by self-disembowelment on a sword; practiced by samurai in the traditional Japanese society	ritual suicide by self-disembowelment on a sword; practiced by samurai in the traditional Japanese society