shibah vs shiva

shibah and shiva both are nouns.

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

As nouns, shibah and shiva are synonyms defined as:

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

Other synonyms of shibah include shivah.

shibah (noun)	shiva (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