seamster noun. 
['si:mstǝ] arch. Also sempster 
['sɛm(p)stǝ]. 
OE.[from SEAM noun1 + -STER.]A person who sews; a person whose occupation is sewing, esp. the making and mending of garments; a tailor.
 ■   seamstering, 
sempstering noun (
rare) the occupation of a seamster 
E19.  [TahlilGaran] English Dictionary ▲