atomic number 5 vs boron

atomic number 5 and boron both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 5	Yes	No	No	No
boron	Yes	No	No	No

As nouns, atomic number 5 and boron are synonyms defined as:

atomic number 5 and boron: a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

Other synonyms of atomic number 5 include B.

atomic number 5 (noun)	boron (noun)
a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder	a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder