As nouns the difference between bolthead and matrass
is that bolthead is (chemistry) a round-bottomed flask with a long neck (used especially for distillation) while matrass is (obsolete) a bolt for a crossbow.
bolthead
English
Noun
(
en noun)
(chemistry) A round-bottomed flask with a long neck (used especially for distillation)
The head of a bolt.
Anagrams
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matrass
English
Noun
(es)
(obsolete) A bolt for a crossbow
(obsolete, chemistry) A bolthead flask