*thes
Here are some words that match your criteria:

- Aphyllanthes
- Archaeornithes
- Aschelminthes
- bedclothes
- cacoethes
- Cheilanthes
- Cleanthes
- clothes
- Coryanthes
- evening clothes
- genus Aphyllanthes
- genus Cheilanthes
- genus Coryanthes
- genus Menyanthes
- genus Nepenthes
- genus Polianthes
- genus Prenanthes
- genus Spiranthes
- Menyanthes
- Nepenthes
- nightclothes
- overclothes
- phylum Aschelminthes
- phylum Platyhelminthes
- plain clothes
- Platyhelminthes
- Polianthes
- Prenanthes
- Spiranthes
- street clothes
- subclass Archaeornithes
- suit of clothes
- Sunday clothes
- swaddling clothes
- underclothes
- winding-clothes
- work-clothes