word_pairs.py

import random

fruits = [
    'apple',
    'avocado',
    'banana',
    'cherry',
    'coconut',
    'date',
    'fig',
    'grape',
    'kiwi',
    'lemon',
    'lime',
    'mango',
    'melon',
    'nut',
    'olive',
    'orange',
    'peach',
    'pear',
    'plum',
    'star',
]

pets = [
    'dog',
    'sheep',
    'pig',
    'goat',
    'cow',
    'cat',
    'duck',
    'camel',
    'goose',
    'yak',
    'mouse',
    'dove',
    'rat',
    'fox',
    'snail',
    'swan',
    'deer',
    'python',
]

colors = [
    'amber',
    'aqua',
    'black',
    'blue',
    'bronze',
    'cobalt',
    'coral',
    'cream',
    'denim',
    'drab',
    'emerald',
    'forest',
    'grape',
    'gray',
    'gold',
    'green',
    'indigo',
    'ivory',
    'jade',
    'jet',
    'lilac',
    'magenta',
    'mint',
    'mustard',
    'navy',
    'onyx',
    'pink',
    'red',
    'rose',
    'ruby',
    'rust',
    'silver',
    'sky',
    'tan',
    'teal',
    'tulip',
    'violet',
    'white',
    'yellow',
]

months = [
    'january',
    'february',
    'march',
    'april',
    'may',
    'june',
    'july',
    'august',
    'september',
    'october',
    'november',
    'december',
]

arrays = [fruits, pets, colors, months]

tup = random.sample(arrays, 2)
s = random.choice(tup[0]) + ' ' + random.choice(tup[1])
print s.lower()