gathering, assembly / an assortment / (mathematics) set

a phobia

disgraceful, shameful, indecent / shabby, unsightly

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

hole, opening

hole / opening, aperture / pit / cave, cavern / lair, den, burrow / loss, deficit / flaw, defect

gather, assemble, aggregate

in a flash, in an instant

feeling; sense

feeling, sensation, emotion