collegian vs student

collegian and student both are nouns.

Word	Noun	Adjective	Verb	Adverb
collegian	Yes	No	No	No
student	Yes	No	No	No

As nouns, student is a hypernym of collegian; that is, student is a word with a broader meaning than collegian:

Other hypernyms of collegian include educatee, pupil.

collegian (noun)	student (noun)
a student (or former student) at a college or university	a learner who is enrolled in an educational institution
	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs