regular vs political science

regular and political science both are nouns.

Word	Noun	Adjective	Verb	Adverb
regular	Yes	Yes	No	No
political science	Yes	No	No	No

regular (noun)	political science (noun)
a garment size for persons of average height and weight	the study of government of states and other political units
a regular patron
a dependable follower (especially in party politics)
a soldier in the regular army

regular (adjective)	political science (adjective)
in accordance with fixed order or procedure or principle
(of solids) having clear dimensions that can be measured; volume can be determined with a suitable geometric formula
(used of the military) belonging to or engaged in by legitimate army forces
not constipated
relating to a person who does something regularly
officially full-time
not deviating from what is normal
regularly scheduled for fixed times
conforming to a standard or pattern
occurring at fixed intervals
symmetrically arranged
often used as intensifiers
in accord with regular practice or procedure