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Baleen
Plates or blades of "whalebone," from two to twelve feet long, and sometimes a foot wide, which in certain whales (Balaenoidea) are attached side by side along the upper jaw, and form a fringelike sieve by which the food is retained in the mouth.
A firm, elastic substance resembling horn, taken from the upper jaw of the right whale; baleen. It is used as a stiffening in stays, fans, screens, a…
oewn 202368% interchangeable
Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.