seraph vs angel

seraph and angel both are nouns.

Word	Noun	Adjective	Verb	Adverb
seraph	Yes	No	No	No
angel	Yes	No	No	No

As nouns, angel is a hypernym of seraph; that is, angel is a word with a broader meaning than seraph:

seraph: an angel of the first order; usually portrayed as the winged head of a child
angel: spiritual being attendant upon God

seraph (noun)	angel (noun)
an angel of the first order; usually portrayed as the winged head of a child	spiritual being attendant upon God
	someone who provides financial support for some venture
	person of exceptional holiness