H - Thyme

 Thyme probably comes to us from the Greek word 'thymon'.  Chimera is from a Greek word also - 'cheimon'.  Sphagnum moss too has Greek origins in the word 'sphagnos'.  These words entered English in the 14th century.   I tend to pronounce 'herb' w/o the 'h' sound so guess that could count as another word where we drop the 'h'.  (By the way, can you tell I like Penzeys spices?)