collect vs amass

collect is a noun but amass is not a noun.

Word	Noun	Adjective	Verb	Adverb
collect	Yes	Yes	Yes	Yes
amass	No	No	Yes	No

As verbs, amass is a hypernym of collect; that is, amass is a word with a broader meaning than collect:

Other hypernyms of collect include accumulate, collect, compile, hoard, pile up, roll up.

As verbs, collect and amass are synonyms defined as:

Other synonyms of collect include accumulate, compile, hoard, pile up, roll up.

collect (noun)	amass (noun)
a short prayer generally preceding the lesson in the Church of Rome or the Church of England

collect (adjective)	amass (adjective)
payable by the recipient on delivery

collect (verb)	amass (verb)
assemble or get together	increase in amount by collecting or gathering
get or bring together	get or gather together
get or gather together
call for and obtain payment of
gather or collect

collect (adverb)	amass (adverb)
make a telephone call or mail a package so that the recipient pays