The word 'smellers' refers to the organs responsible for the sense of smell, namely the nose. Some synonyms for smellers include snoot, sniffer, schnozzle, proboscis, truffle snout, and olfactory organ. These words are often used in a humorous or informal context, and can add a touch of whimsy to a conversation or piece of writing. Each of these synonyms also carries a slightly different connotation, with proboscis and schnozzle being particularly playful and snoot carrying a more derogatory tone. Nonetheless, these words all refer to the same part of the anatomy and convey the idea of a heightened sense of smell.