Sb vs antimony

Sb and antimony both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sb	Yes	No	No	No
antimony	Yes	No	No	No

As nouns, Sb and antimony are synonyms defined as:

Sb and antimony: a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite

Other synonyms of Sb include atomic number 51.

Sb (noun)	antimony (noun)
a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite	a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite