valentine vs truelove

valentine and truelove both are nouns.

Word	Noun	Adjective	Verb	Adverb
valentine	Yes	No	No	No
truelove	Yes	No	No	No

As nouns, truelove is a hypernym of valentine; that is, truelove is a word with a broader meaning than valentine:

valentine: a sweetheart chosen to receive a greeting on Saint Valentine's Day
truelove: a person loved by another person

Other hypernyms of valentine include steady, sweetheart, sweetie.

valentine (noun)	truelove (noun)
a sweetheart chosen to receive a greeting on Saint Valentine's Day	a person loved by another person