skim off vs cream

skim off is not a noun while cream is a noun.

Word	Noun	Adjective	Verb	Adverb
skim off	No	No	Yes	No
cream	Yes	No	Yes	No

As verbs, skim off and cream are synonyms defined as:

Other synonyms of skim off include cream off, skim.

skim off (noun)	cream (noun)
	toiletry consisting of any of various substances in the form of a thick liquid that have a soothing and moisturizing effect when applied to the skin
	the part of milk containing the butterfat
	the best people or things in a group

skim off (verb)	cream (verb)
pick the best	add cream to one's coffee, for example
remove from the surface	make creamy by beating
	remove from the surface
	put on cream, as on one's face or body
	beat thoroughly and conclusively in a competition or fight