filler vs makeweight

filler and makeweight both are nouns.

Word	Noun	Adjective	Verb	Adverb
filler	Yes	No	No	No
makeweight	Yes	No	No	No

As nouns, filler and makeweight are synonyms defined as:

filler (noun)	makeweight (noun)
the tobacco used to form the core of a cigar	a weight added to the scale to reach a required weight
anything added to fill out a whole	anything added to fill out a whole
copy to fill space between more important articles in the layout of a magazine or newspaper
100 filler equal 1 forint in Hungary
used for filling cracks or holes in a surface