"smell" - olfactory
red + ol + ent --> redolent
on(e) + ly --> only
on(e) + ce --> once
"work"
ope/ + er + ate/ + ion --> operation
ope/ + er + ate/ + ive --> operative
ope/ + er + ate/ + or --> operator
ope/ + era --> opera
magum + ope/ + us --> magnumopus
co + ope/ + er + ate --> cooperate
ope/ + ule/ + ence --> opulence
ope/ + ule/ + ent --> opulent
https://linguisteducatorexchange.com/2015/05/13/music-to-my-ears/
opine/ + ion --> opinion