3 syllable words
president
pre-si-dent
innocent
in-no-cent
adventure
ad-ven-ture
competent
com-pe-tent
reference
re-fe-rence
negligence
neg-li-gence
prominent
pro-mi-nent
incidence
in-ci-dence

continent
con-ti-nent
incident
in-ci-dent
demotion
de-mo-tion
competence
com-pe-tence
adherence
ad-her-ence
invention
in-ven-tion
confidence
con-fi-dence
talented
ta-len-ted
transpater
trans-pa-ter
invention
in-ven-tion
repellent
re-pel-lent
accident
ac-ci-dent