reject vs push aside

reject is a noun but push aside is not a noun.

Word	Noun	Adjective	Verb	Adverb
reject	Yes	No	Yes	No
push aside	No	No	Yes	No

As verbs, push aside is a hyponym of reject; that is, push aside is a word with a more specific, narrower meaning than reject:

reject (noun)	push aside (noun)
the person or thing that is rejected or set aside as inferior in quality

reject (verb)	push aside (verb)
not accept something given or offered	bar from attention or consideration
dismiss from consideration or a contest	push out of the way
deem wrong or inappropriate
reject with contempt
not accept as true
refuse entrance or membership
resist immunologically the introduction of some foreign tissue or organ