to find out (something)(in order to be certain)

make sure

to find out (something) (by accident); get knowledge of (something existing but not yet known)

find, uncover

(to pay attention in order) to hear

hear and pay attention

to discover, show, the position of (something); to establish (something) in a place

find

to be careful; take care

be wary

to see and notice, watch, (a person, act etc); to pay attention to (rules etc)

see, notice

to hear (a person, conversation etc) without the knowledge of the speaker(s), deliberately or by chance

hear and pay attention

to be careful (about a possible danger)

be wary