filling vs weft

filling and weft both are nouns.

Word	Noun	Adjective	Verb	Adverb
filling	Yes	No	No	No
weft	Yes	No	No	No

As nouns, filling and weft are synonyms defined as:

Other synonyms of filling include pick, woof.

filling (noun)	weft (noun)
the act of filling something	the yarn woven across the warp yarn in weaving
the yarn woven across the warp yarn in weaving
(dentistry) a dental appliance consisting of any of various substances (as metal or plastic) inserted into a prepared cavity in a tooth
a food mixture used to fill pastry or sandwiches etc.
flow into something (as a container)
any material that fills a space or container