paronymous
adjective
par·on·y·mous pə-ˈrä-nə-məs 
pa-
1
: conjugate sense 4
2
a
: formed from a word in another language
b
: having a form similar to that of a cognate foreign word
Word History
Etymology
Greek parōnymos, from para- + -ōnymos (as in homōnymos homonymous)
First Known Use
1656, in the meaning defined at sense 1