As nouns the difference between disciplines and subjects
is that disciplines is plural of lang=en while subjects is plural of subject.
As verbs the difference between disciplines and subjects
is that disciplines is third-person singular of discipline while subjects is third-person singular of subject.
disciplines
English
Noun
(head)
Verb
(head)
(discipline)
----
subjects
English
Etymology 1
See (subject) (noun)
Noun
(head)
Etymology 2
See (subject) (verb)
Verb
(head)
(subject)