anovulant vs Ovulen

anovulant and Ovulen both are nouns.

Word	Noun	Adjective	Verb	Adverb
anovulant	Yes	No	No	No
Ovulen	Yes	No	No	No

As nouns, Ovulen is a hyponym of anovulant; that is, Ovulen is a word with a more specific, narrower meaning than anovulant:

anovulant: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception
Ovulen: trade name for an oral contraceptive containing mestranol and a progestin compound

Other hyponyms of anovulant include Demulen, Enovid, Loestrin, Lo/Ovral, Micronor, Modicon, Norinyl, Norlestrin, Nor-Q-D, Ovocon, Ovral, Ovrette.

anovulant (noun)	Ovulen (noun)
a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception	trade name for an oral contraceptive containing mestranol and a progestin compound