reject vs refuse

reject and refuse both are nouns.

Word	Noun	Adjective	Verb	Adverb
reject	Yes	No	Yes	No
refuse	Yes	No	Yes	No

As verbs, refuse is a hypernym of reject; that is, refuse is a word with a broader meaning than reject:

Other hypernyms of reject include decline.

As verbs, reject and refuse are synonyms defined as:

Other synonyms of reject include decline, pass up, turn down.

As verbs, reject and refuse are synonyms defined as:

Other synonyms of reject include turn away, turn down.

As verbs, reject and refuse are synonyms defined as:

reject and refuse: resist immunologically the introduction of some foreign tissue or organ

Other synonyms of reject include resist.

reject (noun)	refuse (noun)
the person or thing that is rejected or set aside as inferior in quality	food that is discarded (as from a kitchen)

reject (verb)	refuse (verb)
not accept something given or offered	show unwillingness towards
dismiss from consideration or a contest	not accept as true
deem wrong or inappropriate	refuse to let have
reject with contempt	refuse entrance or membership
not accept as true	elude, especially in a baffling way
refuse entrance or membership	resist immunologically the introduction of some foreign tissue or organ
resist immunologically the introduction of some foreign tissue or organ