periodic table vs tabular array

periodic table and tabular array both are nouns.

Word	Noun	Adjective	Verb	Adverb
periodic table	Yes	No	No	No
tabular array	Yes	No	No	No

As nouns, tabular array is a hypernym of periodic table; that is, tabular array is a word with a broader meaning than periodic table:

periodic table: (chemistry) a tabular arrangement of the chemical elements according to atomic number as based on the periodic law
tabular array: a set of data arranged in rows and columns

Other hypernyms of periodic table include table.

periodic table (noun)	tabular array (noun)
(chemistry) a tabular arrangement of the chemical elements according to atomic number as based on the periodic law	a set of data arranged in rows and columns