rudiments vs fundamentals

rudiments and fundamentals both are nouns.

Word	Noun	Adjective	Verb	Adverb
rudiments	Yes	No	No	No
fundamentals	Yes	No	No	No

As nouns, fundamentals is a hypernym of rudiments; that is, fundamentals is a word with a broader meaning than rudiments:

Other hypernyms of rudiments include basic principle, basics, bedrock, fundamental principle.

rudiments (noun)	fundamentals (noun)
the elementary stages of any subject (usually plural)	principles from which other truths can be derived
a statement of fundamental facts or principles