semiquaver vs sixteenth note

semiquaver and sixteenth note both are nouns.

Word	Noun	Adjective	Verb	Adverb
semiquaver	Yes	No	No	No
sixteenth note	Yes	No	No	No

As nouns, semiquaver and sixteenth note are synonyms defined as:

semiquaver and sixteenth note: a musical note having the time value of a sixteenth of a whole note

semiquaver (noun)	sixteenth note (noun)
a musical note having the time value of a sixteenth of a whole note	a musical note having the time value of a sixteenth of a whole note