arcsin vs arcsine

arcsin and arcsine both are nouns.

Word	Noun	Adjective	Verb	Adverb
arcsin	Yes	No	No	No
arcsine	Yes	No	No	No

As nouns, arcsin and arcsine are synonyms defined as:

arcsin and arcsine: the inverse function of the sine; the angle that has a sine equal to a given number

Other synonyms of arcsin include arc sine, inverse sine.

arcsin (noun)	arcsine (noun)
the inverse function of the sine; the angle that has a sine equal to a given number	the inverse function of the sine; the angle that has a sine equal to a given number