tesha` (Hebrew #8672)
perhaps from 8159 through the idea of a turn to the next or full number ten; nine or (ord.) ninth
KJV usage: nine (+ -teen, + -teenth, -th).
Pronounce: tay'-shah
Origin: or (masculine) tishtah {tish-aw'}
`asar (Hebrew #6240)
ten (only in combination), i.e. -teen; also (ordinal) -teenth
KJV usage: (eigh-, fif-, four-, nine-, seven-, six-, thir-)teen(-th), + eleven(-th), + sixscore thousand, + twelve(-th).
Pronounce: aw-sawr'