shiva vs shibah

shiva and shibah both are nouns.

Word	Noun	Adjective	Verb	Adverb
shiva	Yes	No	No	No
shibah	Yes	No	No	No

As nouns, shiva and shibah are synonyms defined as:

shiva and shibah: (Judaism) a period of seven days of mourning after the death of close relative

Other synonyms of shiva include shivah.

shiva (noun)	shibah (noun)
(Judaism) a period of seven days of mourning after the death of close relative	(Judaism) a period of seven days of mourning after the death of close relative