desert vs desertion

desert and desertion both are nouns.

Word	Noun	Adjective	Verb	Adverb
desert	Yes	No	Yes	No
desertion	Yes	No	No	No

desert (noun)	desertion (noun)
arid land with little or no vegetation	withdrawing support or help despite allegiance or responsibility
(usually plural) a person's deservingness of or entitlement to reward or punishment	the act of giving something up

desert (verb)	desertion (verb)
leave someone who needs or counts on you; leave in the lurch
leave behind
desert (a cause, a country or an army), often in order to join the opposing cause, country, or army