hafnium vs Hf

hafnium and Hf both are nouns.

Word	Noun	Adjective	Verb	Adverb
hafnium	Yes	No	No	No
Hf	Yes	No	No	No

As nouns, hafnium and Hf are synonyms defined as:

hafnium and Hf: a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

Other synonyms of hafnium include atomic number 72.

hafnium (noun)	Hf (noun)
a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons	a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons