Rhymes:English/əʊt(j)uːb

Two syllables

 * blow-tube, blowtube
 * flowtube

Three syllables

 * geotube
 * microtube
 * monotube
 * orthotube
 * phototube
 * Rhymes for nanotube
 * Rhymes for cryotube

Four syllables

 * torpedo-tube