WordNet sense 1 (consonant articulated by constricting (but not closing) the vocal tract):

continuant consonant

WordNet sense 2 (of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')):

fricative, sibilant, strident, spirant

WordNet sense 3 ((of speech sounds); produced with the back of the tongue raised toward the hard palate; characterized by a hissing or hushing sound (as `s' and `sh')):

soft

WordNet sense 4 (continually recurring or continuing without interruption):

constant

WordNet sense 5 (seemingly without interruption; chiefly restricted to what recurs regularly or frequently in a prolonged and closely spaced series):

continual