secretory phase vs menstrual cycle

secretory phase and menstrual cycle both are nouns.

Word	Noun	Adjective	Verb	Adverb
secretory phase	Yes	No	No	No
menstrual cycle	Yes	No	No	No

secretory phase (noun)	menstrual cycle (noun)
the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins	a recurring cycle (beginning at menarche and ending at menopause) in which the endometrial lining of the uterus prepares for pregnancy; if pregnancy does not occur the lining is shed at menstruation