truelove vs valentine

truelove and valentine both are nouns.

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

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

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

Other hyponyms of truelove include dulcinea, ladylove, sugar daddy.

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