Groups of Verbs

volver - to return (o -> ue)
devolver - to return (something) (o -> ue)
envolver - to wrap up (o -> ue)
revolver - to stir, mix, toss (a salad) (o -> ue)
resolver - to solve (o -> ue)

sentir - to feel sorry, regret (e -> ie)
consentir - to consent (e -> ie)

decir - to say, tell (e -> i)
bendecir - to bless (e -> i)
maldecir - curse (e -> i)v

pedir - to ask for (e -> i)
despedir - to fire (e -> i)
impedir - to impede (e -> i)
medir - to measure (e -> i)
competir - to compete (e -> i)
repetir - to repeat (e -> i)

elegir - to elect, choose (e -> i)
colegir - to deduce (e -> i)
corregir - to correct (e -> i)

seguir - to follow, continue (e -> i)
conseguir - to achieve, obtain, manage to (e -> i)

freír - to fry (e -> i)
reír - to laugh (e -> i)
parecer - to seem
aparecer - to appear
desaparecer - to disappear

conocer - to know (a person or place)
reconocer - to recognise

conducir - to drive, conduct (conduzco)
deducir - to deduce
inducir - to induce
introducir - to introduce, insert
producir - to produce
reducir - to reduce
traducir - to translate

coger - to catch (cojo)
escoger - to select
recoger - collect, gather

raer - to scrape (raigo)
traer - to bring (traigo)
atraer - to attract
contraer - to contract
retraer - to bring back
sustraer - to remove, subtract

fluir - to flow (fluyo)
influir - to influence
incluir - to includev concluir - conclude

construir - to construct
destruir - to destroy

Gustar et al.

bastar
disgustar
doler (o -> ue)
encantar
faltar
fascinar
gustar
importar
interesar
molar
molestar
parecer
sobrar

The "auns"

aun - even
aún - still (todavía)
aunque - although
incluso
hasta - up to (even)
cada vez más - more and more
todavía - even