spiller vs aggressor

spiller and aggressor both are nouns.

Word	Noun	Adjective	Verb	Adverb
spiller	Yes	No	No	No
aggressor	Yes	No	No	No

As nouns, aggressor is a hypernym of spiller; that is, aggressor is a word with a broader meaning than spiller:

Other hypernyms of spiller include assailant, assaulter, attacker.

spiller (noun)	aggressor (noun)
a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys)	someone who attacks
an attacker who sheds or spills blood	a confident assertive person who acts as instigator