backache

English Thesaurus

1. an ache localized in the back (noun.state)

hypernym	:	ache, aching,
definition	:	a dull persistent (usually moderately intense) pain (noun.state)

hyponym	:	lumbago, lumbar pain,
definition	:	backache affecting the lumbar region or lower back; can be caused by muscle strain or arthritis or vascular insufficiency or a ruptured intervertebral disc (noun.state)