Luckily I don't have any fears as the ones mentioned...Injections, flying, lifts and boats.
But I do have a fear of being buried alive, that is to say
when I die I wish to be cremated, so there is no possibility of me waking up 6 ft under!! Of course that is totally irrational (as the question asked), because I would have suffocated anyway in such a confinement! It didn't help me, when I saw a TV film (based on true story) of a girl who was kidnapped and "buried" in a chamber, with a limited supply of food/water [air supply from tubes connected in the 'coffin' to the surface]. They did eventually find her still alive!
Spiders, wasps, bats and moths (small and large).