Trip is common as a noun that refers to a journey.
It is a count noun, and can be singular or plural:
Bob and Lana met on a trip to the Caribbean.
Our family has taken many trips together.
Travel is common as a verb meaning to go from one
place to another:
Travel as a noncount noun is the activity of traveling:
John travels a lot in his business.
Melissa has traveled all over the world.
Travel is broadening.
Travel is difficult in that region; the roads are
bad and there is no airport.
Travel as a count noun occurs in the plural, but not
in the singular:
In all your travels, have you ever seen such beautiful
He has accumulated 245 city maps for his map collection in his
travels through 60 countries.
Travel does not occur as a singular
count noun. Sometimes a speaker wants to make travel
a singular count noun, as in:
INCORRECT: They took a travel.
INCORRECT: Jack is out of town on a travel.
INCORRECT: On my travel to Antarctica,
I saw several kinds of penguins.