stemming algorithm vs algorithm

stemming algorithm and algorithm both are nouns.

Word	Noun	Adjective	Verb	Adverb
stemming algorithm	Yes	No	No	No
algorithm	Yes	No	No	No

As nouns, algorithm is a hypernym of stemming algorithm; that is, algorithm is a word with a broader meaning than stemming algorithm:

stemming algorithm: an algorithm for removing inflectional and derivational endings in order to reduce word forms to a common stem
algorithm: a precise rule (or set of rules) specifying how to solve some problem

Other hypernyms of stemming algorithm include algorithmic program, algorithmic rule.

stemming algorithm (noun)	algorithm (noun)
an algorithm for removing inflectional and derivational endings in order to reduce word forms to a common stem	a precise rule (or set of rules) specifying how to solve some problem