rudimentary vs undeveloped

rudimentary and undeveloped both are adjectives.

Word	Noun	Adjective	Verb	Adverb
rudimentary	No	Yes	No	No
undeveloped	No	Yes	No	No

rudimentary (adjective)	undeveloped (adjective)
being or involving basic facts or principles	not developed, mature, or fully formulated
being in the earliest stages of development	not developed, improved, exploited or used
not fully developed in mature animals