Who forgiveth
calach (saw-lakh')
to forgive -- forgive, pardon, spare.
all thine iniquities
`avon (aw-vone')
perversity, i.e. (moral) evil -- fault, iniquity, mischeif, punishment (of iniquity), sin.
who healeth
rapha' (raw-faw')
to mend (by stitching), i.e. (figuratively) to cure -- cure, (cause to) heal, physician, repair, thoroughly, make whole.
all thy diseases
tachaluw' (takh-al-oo')
a malady -- disease, grievous, (that are) sick(-ness).