basics vs rudiments

basics and rudiments both are nouns.

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

As nouns, rudiments is a hyponym of basics; that is, rudiments is a word with a more specific, narrower meaning than basics:

Other hyponyms of basics include alphabet, first principles.

As nouns, basics and rudiments are synonyms defined as:

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