mastabah vs mastaba

mastabah and mastaba both are nouns.

Word	Noun	Adjective	Verb	Adverb
mastabah	Yes	No	No	No
mastaba	Yes	No	No	No

As nouns, mastabah and mastaba are synonyms defined as:

mastabah and mastaba: an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof

mastabah (noun)	mastaba (noun)
an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof	an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof