pleomorphic /plē-ō-mörˈfik/, also pleomorphous /-fəs/

1. Occurring in several different forms, polymorphic
2. Changing form several different times during its life cycle (biology)

pleomorˈphism or plēˈomorphy noun

• old lady
• Old Lady of Threadneedle Street
• Old Light
• old-line
• old-liner
• old-liners
• old maid
• old-maidhood
• old-maidish
• old-maidishly
• old-maidism
• old maids
• old man
• Old Man of the Mountain
• old man of the sea
• old man's beard
• old master
• old masters
• old men
• old money
• old-money
• old moon
• old moustache
• oldness
• oldnesses