Page "Manner of articulation" Paragraph 23

Sonorants may also be called resonants, and some linguists prefer that term, restricting the word ' sonorant ' to non-vocoid resonants ( that is, nasals and liquids, but not vowels or semi-vowels ).

Another common distinction is between occlusives ( stops and nasals ) and continuants ( all else ); affricates are considered to be both, because they are sequences of stop plus fricative.