1. John graduated from university two years ago.
Same Word Form
Different Word Form
graduation (n)
finish (v)
complete (v)
conclude (v)
graduate (v)
FROM
university (n)
tertiary (adj)
academic (adj)
ago (adv)
since (conj)
for (prep)

2. My question was not answered.
Same Word Form
Different Word Form
I (S pronoun)
my (adj)
me (OBJ pronoun)
question (v)
query (n)
inquiry (n)
query (v)
inquire (v)
question (n)
answer (n)
respond to (v)
reply to (v)
response (n)
reply (n)
answer (v)

3. football match (compound n)
I’m sure he was upset at the result of the football match.
Same Word Form
Different Word Form
I (Subj. pronoun)
sure (adj)
he (subj. pronoun)
upset (adj)
result (n)
football match (compound n)