lie vs recumb

lie is a noun but recumb is not a noun.

Word	Noun	Adjective	Verb	Adverb
lie	Yes	No	Yes	No
recumb	No	No	Yes	No

As verbs, recumb is a hyponym of lie; that is, recumb is a word with a more specific, narrower meaning than lie:

Other hyponyms of lie include sun, sunbathe, sprawl, recline, repose, overlie, lie awake, repose, bask.

lie (noun)	recumb (noun)
a statement that deviates from or perverts the truth
position or manner in which something is situated

lie (verb)	recumb (verb)
tell an untruth; pretend with intent to deceive	lean in a comfortable resting position
be lying, be prostrate; be in a horizontal position
assume a reclining position
be located or situated somewhere; occupy a certain position
originate (in)
have a place in relation to something else
be and remain in a particular state or condition