part-of-speech tagger vs pos tagger

part-of-speech tagger and pos tagger both are nouns.

Word	Noun	Adjective	Verb	Adverb
part-of-speech tagger	Yes	No	No	No
pos tagger	Yes	No	No	No

As nouns, part-of-speech tagger and pos tagger are synonyms defined as:

part-of-speech tagger and pos tagger: a tagging program whose labels indicate a word's part of speech

part-of-speech tagger (noun)	pos tagger (noun)
a tagging program whose labels indicate a word's part of speech	a tagging program whose labels indicate a word's part of speech