spool vs bobbin

spool and bobbin both are nouns.

Word	Noun	Adjective	Verb	Adverb
spool	Yes	No	Yes	No
bobbin	Yes	No	No	No

As nouns, spool and bobbin are synonyms defined as:

spool and bobbin: a winder around which thread or tape or film or other flexible materials can be wound

Other synonyms of spool include reel.

spool (noun)	bobbin (noun)
a winder around which thread or tape or film or other flexible materials can be wound	a winder around which thread or tape or film or other flexible materials can be wound

spool (verb)	bobbin (verb)
wind onto a spool or a reel
transfer data intended for a peripheral device (usually a printer) into temporary storage