undeveloped vs rudimentary

undeveloped and rudimentary both are adjectives.

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

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