Tb vs terabit

Tb and terabit both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tb	Yes	No	No	No
terabit	Yes	No	No	No

As nouns, Tb and terabit are synonyms defined as:

Tb and terabit: a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits

Other synonyms of Tb include Tbit.

Tb (noun)	terabit (noun)
a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits	a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite