truelove vs lover

truelove and lover both are nouns.

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

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

truelove (noun)	lover (noun)
a person loved by another person	a person who loves someone or is loved by someone
	an ardent follower and admirer
	a significant other to whom you are not related by marriage