The regular verbs are commonly used as verbs; the irregular verbs are commonly used as adjectives.

absorbido - absorbed (verb)
absorto - absorbed (adjective)

abstraído - lost in thought (verb)
abstracto - abstract (adjective)

atendido - absorbed (verb)
atento - absorbed (adjective)

bendecido - blessed (verb)
bendito - blessed, holy (adjective)

circuncidado - circumcised (verb)
circunciso - circumcised (adjective)

compelido - compelled (verb)
compulso - compelled (adjective)

comprimido - compressed (verb)
compreso - compressed (adjective)

concluido - concluded (verb)
concluso - complete (adjective)

confesado - confessed (verb)
confeso - confessed (adjective)

confundido - got mixed up (verb)
confuso - confused (adjective)

contentado - got happy (verb)
contento - happy (adjective)

contraído - contracted (verb)
contracto - contracted (adjective)

convertido - converted (verb)
converso - converted (adjective)

corregido - corrected (verb)
correcto - correct, righteous (adjective)

corrompido - corrupted (verb)
corrupto - corrupt (adjective)

despertado - woken up (verb)
despierto - woken up (adjective)

elegido - chosen (verb)
electo - chosen (adjective)

expresado - expressed (verb)
expreso - expressed (adjective)

extendido - extended (verb)
extenso - extended (adjective)

extinguido - become extint (verb)
extinto - extint (adjective)

fijado - fixed, set up (verb)
fijo - fixed (adjective)

freído - fried (verb)
frito - fried (adjective)

incluido - included (verb)
incluso - inclusive (adjective)

insertado - attached (verb)
inserto - attached (adjective)

invertido - inverted (verb)
inverso - reverse (adjective)

juntado - put together (verb)
junto - together (adjective)

maldecido - cursed (verb)
maldito - damned (adjective)

producido - produced (verb)
producto - produced (adjective)

proveído - provided (verb)
provisto - provided (adjective)

salvado - saved (verb)
salvo - safe, unharmed (adjective)

sujetado - held (verb)
sujeto - subject to (adjective)

teñido - dyed (verb)
tinto - red (adjective)