A tetragram is a group of four letters. (A related word is "Tetragrammaton".) This page features the tetragram "ough".
A Missed Rain
Although in years exhausted waters had run dry,
Boughs had had their falls and leaves and streams gone by,
Coughs did settlers issue now and speech condense.
Droughts so deep were not surpassed by current sense.
Enough to drink was overdue on untold lips,
Fought for as when humor's cordial nature dips.
Hiccoughs made unwelcome outbursts in the land.
Houghs of horsedom overwaits could not withstand.
Loughs of drops receded past what they had been.
Through the light no raining nimbus could be seen.
ɒlˈðow ɪn jiːrz ɛgˈzɒstəd ˈwɒtərz hæd rʌn draj
bawz hæd hæd ðɛr fɒlz ænd liːvz ænd striːmz gɒn baj
kɒfs dɪd ˈsɛtlərz ˈɪʃu naw ænd spiːtʃ kʌnˈdɛns
drʌwts sow diːp wər nɒt sərˈpæst baj ˈkərənt sɛns
iˈnʌf tu drɪŋk wʌz owvərˈduː ɒn ˈʌntowld lɪps
fɒt fɔr æz hwɛn ˈhjuːmərz ˈkɔrdiəl ˈneɪtʃər dɪps
ˈhɪkʌps meɪd ʌnˈwɛlkʌm ˈʌwtbərsts ɪn ðə lænd
hɒks ʌv ˈhɔrsdʌm owvərˈweɪts kʊd nɒt wɪθˈstænd
lɒxs ʌv drɒps riˈsiːdəd pæst hwʌt ðeɪ hæd biːn
θruː ðə lʌjt now ˈreɪnɪŋ ˈnɪmbəs kʊd bi siːn