phase angle vs point in time

phase angle and point in time both are nouns.

Word	Noun	Adjective	Verb	Adverb
phase angle	Yes	No	No	No
point in time	Yes	No	No	No

As nouns, point in time is a hypernym of phase angle; that is, point in time is a word with a broader meaning than phase angle:

phase angle: a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle
point in time: an instant of time

Other hypernyms of phase angle include point.

phase angle (noun)	point in time (noun)
a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle	an instant of time