last / latest
last: adjective usually meaning 'final'
I took the last train to Memphis.
This is the last test of the semester!
latest: adjective meaning 'most recent' or 'new'
His latest book is excellent.
Have you seen his latest painting?
lay / lie
lay: verb meaning 'to put down flat' - past tense - laid, past participle - laid
He laid his pencil down and listened to the teacher.
I usually lay my pies on the shelf to cool.
lie: verb meaning 'to be down' - past tense -lay (be careful!), past participle - lain
The girl lay on the bed asleep.
At the moment, he's lying on the bed.
lose / loose
lose: verb meaning 'to misplace'
I lost my watch!
Have you ever lost anything valuable?
loose: adjective meaning the opposite of 'tight'
Your trousers are very loose!
I need to tighten this screw. It's loose.
male / masculine
male: the sex of a man or animal
The male of the species is very lazy.
The question 'female or male' means 'are you a woman or a man'.
masculine: adjective describing a quality or type of behaviour that is considered typical for a man
She's a very masculine woman.
His opinions are just too masculine for me.
price / prize
price: noun - what you pay for something.
The price was very cheap.
What's the price of this book?
prize: noun - an award
He won a prize as best actor.
Have you ever won a prize in a competition?
principal / principle
principal: adjective meaning 'the most important'
The principal reason for my decision was the money.
What are the principal irregular verbs?
principle: a rule (usually in science but also concerning morals)
It's the first principle of aerodynamics.
He has very loose principles.
quite / quiet
quite: adverb of degree meaning 'very' or 'rather'
This test is quite difficult.
He was quite exhausted after the long journey.
quiet: adjective meaning the opposite of loud or noisy
Could you please be quiet?!
She's a very quiet girl.
sensible / sensitive
sensible: adjective meaning 'having common sense' i.e. 'not stupid'
I wish you would be more sensible about things.
I'm afraid you aren't being very sensible.
sensitive: adjective meaning 'to feel very deeply' or 'to hurt easily'
You should be careful with David. He's very sensitive.
Mary is a very sensitive woman.
shade / shadow
shade: protection from the sun, a dark area outside on a sunny day.
You should sit in the shade for a while.
It's too hot. I'm going to find some shade.
shadow: the dark area created by something else on a sunny day.
That tree casts a large shadow.
Have you every noticed your shadow getting longer as it gets later in the day?
some time / sometimes
some time: refers to an indefinite time in the future
Let's meet for coffee some time.
I don't know when I'll do it - but I will do it some time.
sometimes: adverb of frequency meaning 'occasionally'
He sometimes works late.
Sometimes, I like eating Chinese food.