L-P vs platter

L-P and platter both are nouns.

Word	Noun	Adjective	Verb	Adverb
L-P	Yes	No	No	No
platter	Yes	No	No	No

As nouns, platter is a hypernym of L-P; that is, platter is a word with a broader meaning than L-P:

L-P: a long-playing phonograph record; designed to be played at 33.3 rpm
platter: sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove

Other hypernyms of L-P include disc, disk, phonograph record, phonograph recording, record.

L-P (noun)	platter (noun)
a long-playing phonograph record; designed to be played at 33.3 rpm	a large shallow dish used for serving food
	sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove