combine vs amalgamate

combine is a noun but amalgamate is not a noun.

Word	Noun	Adjective	Verb	Adverb
combine	Yes	No	Yes	No
amalgamate	No	Yes	Yes	No

As verbs, amalgamate is a hypernym of combine; that is, amalgamate is a word with a broader meaning than combine:

Other hypernyms of combine include commix, mingle, mix, unify.

As verbs, amalgamate is a hypernym of combine; that is, amalgamate is a word with a broader meaning than combine:

Other hypernyms of combine include commix, mingle, mix, unify.

combine (noun)	amalgamate (noun)
harvester that heads and threshes and cleans grain while moving across the field
an occurrence that results in things being united
a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service

combine (adjective)	amalgamate (adjective)
	joined together into a whole

combine (verb)	amalgamate (verb)
mix together different elements	to bring or combine together or with something else
put or add together
combine so as to form a whole; mix
gather in a mass, sum, or whole
add together from different sources
join for a common purpose or in a common action
have or possess in combination