collectible vs payable

collectible and payable both are nouns.

Word	Noun	Adjective	Verb	Adverb
collectible	Yes	Yes	No	No
payable	Yes	Yes	No	No

As adjectives, collectible and payable are synonyms defined as:

collectible and payable: subject to or requiring payment especially as specified

Other synonyms of collectible include collectable.

collectible (noun)	payable (noun)
things considered to be worth collecting (not necessarily valuable or antique)	a liability account showing how much is owed for goods and services purchased on credit

collectible (adjective)	payable (adjective)
subject to or requiring payment especially as specified	subject to or requiring payment especially as specified