1: θανατηφόρος
(Strong's #2287 — Adjective — thanatephoros — than-at-ay'-for-os )

lit., "death-bearing, deadly" (thanatos, "death," phero, "to bear"), is used in James 3:8 . In the Sept., Numbers 18:22; Job 33:23 .

2: θανάσιμος
(Strong's #2286 — Adjective — thanasimos — than-as'-ee-mos )

from thanatos (see No. 1), "belonging to death, or partaking of the nature of death," is used in Mark 16:18 .